I found online this description and guidelines for stating the condition of a listed item.  This is what Candentco uses and it is very useful to have.

Books

•    New: Just like it sounds. A brand-new, unused, unread copy in perfect condition.

•    Like New: An apparently unread copy in perfect condition. Dust cover is intact; pages are clean and are not marred by notes or folds of any kind. Suitable for presenting as a gift.

•    Very Good: A copy that has been read, but remains in excellent condition. Pages are intact and are not marred by notes or highlighting. The spine remains undamaged.

•    Good: A copy that has been read, but remains in clean condition. All pages are intact, and the cover is intact (including dust cover, if applicable). The spine may show signs of wear. Pages can include limited notes and highlighting, and the copy can include “From the library of” labels.

•    Acceptable: A readable copy. All pages are intact, and the cover is intact (the dust cover may be missing).

Music

•    New: Just like it sounds. A brand-new, unused, unopened CD or cassette in perfect condition.
•    Like New: An apparently unopened CD or cassette in perfect condition (although it may be out of its original wrapping). The jewel case or cassette case is pristine. The liner notes, inclusions, and/or sleeve are in perfect condition. The CD or tape itself is unmarked, with no sign of wear. Suitable for presenting as a gift.
•    Very Good: A well-cared-for CD or cassette that has been listened to, but remains in great condition and plays perfectly. The jewel case/cassette case may show limited signs of wear, as may the liner notes and inclusions.
•    Good: The CD or cassette plays perfectly but has clear signs of wear. The jewel case or cassette case is undamaged, and original liner notes are in good, unmarked condition. The CD, cassette, or packaging may have identification markings from its owner.
•    Acceptable: The CD or cassette plays perfectly, but is otherwise the worse for wear. The jewel case or cassette case may be damaged, and the liner notes may be marked (but remain complete and legible). The CD, cassette, or packaging may have identification markings from its owner.

Videos and DVDs

•    New: Just like it sounds. A brand-new, unused, unopened video or DVD in perfect condition in its original packaging and with all original packaging materials included.
•    Like New: An apparently unopened video or DVD in perfect condition (although it may be out of its original wrapping). The box or jewel case is clean and vivid, with no signs of wear. Suitable for presenting as a gift.
•    Very Good: A well-cared-for video or DVD that has been listened to, but remains in great condition. The film is complete, without interruption, and does not skip. The box or jewel case may show limited signs of wear, as may the liner notes.
•    Good: A video or DVD with clear external signs of wear, but one that continues to play perfectly. The video or DVD may have identification markings from its owner.
•    Acceptable: A video or DVD with extensive external signs of wear, but one that continues to play perfectly. The box or jewel case may be damaged, and the notes or other inclusions may be marked (but remain complete and legible). The video or DVD may have identification markings from its owner.

Video Games

•    New: Just like it sounds. A brand-new, unused, unopened video game in perfect condition in its original packaging and with all original packaging materials included.
•    Like New: An apparently unopened video game in perfect condition (although it may be out of its original wrapping). The box and item are pristine, with no signs of wear. Suitable for presenting as a gift.
•    Very Good: A well-cared-for video game that has been played but remains in great condition. The game and its original packaging are complete and slightly worn, but unmarked and undamaged.
•    Good: The video game shows wear from consistent use, but remains in good condition. There may be clear external signs of wear and damage to the original packaging or instructions, but the game plays perfectly. The video game may have identification markings from its owner.
•    Acceptable: The video game is fairly worn, but it continues to work perfectly. The box and instructions may be missing or damaged. The video game may have identification markings from its owner.

Electronics

•    New: Just like it sounds. A brand-new, unused, unopened product in its original packaging and with all original packaging materials included. The original manufacturer’s warranty, if any, should still apply, with details of the warranty included in the conditions comments.
•    Refurbished: A product that has been professionally restored to working order. Typically, this means the product has been inspected, cleaned, and repaired to meet manufacturer specifications. The product may or may not be in its original packaging. The manufacturer warranty or warranty of the company performing the refurbishing services may apply to the product and should be included in the conditions comments.
•    Like New: An apparently untouched electronics item in perfect condition. The original plastic wrap may be missing, but the original packaging is intact. There are absolutely no signs of wear. Suitable for presenting as a gift.
•    Very Good: A well-cared-for item that has seen limited use but remains in great condition. The item and its instructions are complete and undamaged, but may show some signs of wear. The item works perfectly.
•    Good: The item shows wear from consistent use, but remains in good condition. The original instructions are included and are in acceptable condition. The item may be marked or identified, and may show other signs of previous use. The item works perfectly and is in good overall shape.
•    Acceptable: The item is fairly worn, but it continues to work perfectly. The signs of wear can include scratches, dents, and other aesthetic problems. The box and nonessential instructions may be missing or damaged. The item may be marked or identified, and show other signs of previous use.

Tools & Hardware

•    New: Just like it sounds. A brand-new, unused, unopened product in its original packaging and with all original packaging materials included. The original manufacturer’s warranty, if any, should still apply, with details of the warranty included in the conditions comments.
•    Refurbished: A product that has been professionally restored to working order. Typically, this means the product has been inspected, cleaned, and repaired to meet manufacturer specifications. The product may or may not be in its original packaging. The manufacturer’s warranty or warranty of the company performing the refurbishing services may apply to the product and should be included in the conditions comments.
•    Like New: An apparently untouched product, in perfect condition. The original plastic wrap may be missing, but the original packaging is intact and pristine, and instructions are included. There are absolutely no signs of wear. Suitable for presenting as a gift.
•    Very Good: A well-cared-for product that has seen limited use but remains in great condition. The item is complete, unmarked, and undamaged, but may show some limited signs of wear. The product works perfectly.
•    Good: The product shows wear from consistent use, but remains in good condition. The item may be marked or have identifying information on it, and show other signs of previous use. The product works perfectly.
•    Acceptable: The product is fairly worn, but it continues to work perfectly. The signs of wear can include scratches, dents, and other aesthetic problems. The product may be marked or have identifying information on it, and show other signs of previous use.

Camera & Photo

•    New: Just like it sounds. A brand-new, unused, unopened product in its original packaging and with all original packaging materials included. The original manufacturer’s warranty, if any, should still apply, with details of the warranty included in the condition comments.
•    Refurbished: A product that has been professionally restored to working order. Typically, this means the product has been inspected, cleaned, and repaired to meet manufacturer specifications. May or may not be in its original packaging. The manufacturer warranty or warranty of the company performing the refurbishing services may apply to the product and should be included in the “conditions comments.”
•    Like New: An apparently untouched camera or photography item in perfect condition. The original wrapping may be missing, but the original packaging is intact. There are absolutely no signs of wear. Suitable for presenting as a gift. On the 1-10 point used-equipment scale, this must be 10- or higher.
•    Very Good: A well-cared-for camera or photography item that has seen limited use but remains in great condition. The item and its instructions are complete and undamaged, but may show some signs of wear. The item works perfectly. On the 1-10 point used-equipment scale, this must be rated 9-, 9, or 9+.
•    Good: A camera or photography item that shows wear from consistent use, but remains in good condition. The original instructions are included and are in acceptable condition. The item may be marked or identified, and show other signs of previous use. The item works perfectly and is in good overall shape. On the 1-10 point used-equipment scale, this must be rated 8-, 8, or 8+.
•    Acceptable: A camera or photography item that is fairly worn, but continues to work perfectly. Signs of wear can include scratches, dings, and other aesthetic problems. The box and nonessential instructions may be missing or damaged. The item may be marked or identified, and show other signs of previous use. On the 1-10 point used-equipment scale, this must be rated 7-, 7, or 7+.

Kitchen & Housewares

•    New: Just like it sounds. A brand-new, unused, unopened product in its original packaging and with all original packaging materials included. The original manufacturer’s warranty, if any, should still apply, with details of the warranty included in the condition comments.
•    Refurbished: An item refurbished by the manufacturer or remanufacturer in Like New condition whose purchase price includes a manufacturer’s or remanufacturer’s warranty. Details of the warranty should be included in the condition comments.
•    Like New: An apparently untouched kitchen item in perfect condition. The original plastic wrap may be missing, but the original packaging is intact. There are absolutely no signs of wear. Suitable for presenting as a gift.
•    Very Good: A well-cared-for item that has seen limited use but remains in great condition. The item and its instructions are complete and undamaged, but may show some signs of wear. The item works perfectly.
•    Good: The item shows wear from consistent use, but remains in good condition. The original instructions are included and are in acceptable condition. The item may be marked or identified, and show other signs of previous use. The item works perfectly and is in good overall shape.
•    Acceptable: The item is fairly worn, but it continues to work perfectly. The signs of wear can include scratches, dents, and other aesthetic problems. The box and nonessential instructions may be missing or damaged. The item may be marked or identified, and show other signs of previous use.

Software & Computer Games

•    New: Just like it sounds. Brand-new, unused, unopened software or computer game in perfect condition in its original packaging and with all original packaging materials included. New games should include the original UPC.
•    Like New: Apparently unopened software or computer game in perfect condition (although it may be out of its original wrapping). The box and jewel case are pristine, with no signs of wear. The UPC should be visible. Suitable for presenting as a gift.
•    Very Good: Well-cared-for software or computer game that has been used but remains in great condition. The software or computer game and its original packaging are complete and slightly worn, but unmarked and undamaged, with the UPC visible.
•    Good: The software or computer game may show wear from consistent use, but it still remains in good condition. There may be clear external signs of wear and damage to the original packaging or instructions, but the software or computer game itself works perfectly. The original UPC should be visible.
•    Acceptable: The software or computer game is fairly worn, but it continues to work perfectly. The box and instructions may be missing or damaged. Use this condition when the original UPC and/or the original jewel case is missing.

Outdoor Living

•    New: Just like it sounds. A brand-new, unused, unopened product in its original packaging and with all original packaging materials included. The original manufacturer’s warranty, if any, should still apply, with details of the warranty included in the conditions comments.
•    Refurbished: A product that has been professionally restored to working order. Typically, this means the product has been inspected, cleaned, and repaired to meet manufacturer specifications. The product may or may not be in its original packaging. The manufacturer’s warranty or warranty of the company performing the refurbishing services may apply to the product and should be included in the conditions comments.
•    Like New: An apparently untouched product, in perfect condition. The original plastic wrap may be missing, but the original packaging is intact and pristine, and instructions are included. There are absolutely no signs of wear. Suitable for presenting as a gift.
•    Very Good: A well-cared-for product that has seen limited use but remains in great condition. The item is complete, unmarked, and undamaged, but may show some limited signs of wear. The product works perfectly.
•    Good: The product shows wear from consistent use, but remains in good condition. The item may be marked or have identifying information on it, and show other signs of previous use. The product works perfectly.
•    Acceptable: The product is fairly worn, but it continues to work perfectly. The signs of wear can include scratches, dents, and other aesthetic problems. The product may be marked or have identifying information on it, and show other signs of previous use.

Computers

•    New: Just like it sounds. A brand-new, unused, unopened product in its original packaging and with all original packaging materials and software included. The original manufacturer’s warranty, if any, should still apply, with details of the warranty included in the conditions comments.
•    Refurbished: A product that has been professionally restored to working order. Typically, this means the product has been inspected, cleaned, and repaired to meet manufacturer specifications. May or may not be in its original packaging. The manufacturer’s warranty or warranty of the company performing the refurbishing services may apply to the product and should be included in the conditions comments.
•    Like New: An apparently untouched computer item in perfect condition. The original plastic wrap may be missing, but the original packaging and software is intact. There are absolutely no signs of wear. Suitable for presenting as a gift.
•    Very Good: A well-cared-for item that has seen limited use but remains in great condition. The item and its instructions and software are complete and undamaged, but may show some signs of wear. The item works perfectly.
•    Good: The item shows wear from consistent use, but remains in good condition. The original instructions and software are included and are in acceptable condition. The item may be marked or identified, and show other signs of previous use. The item works perfectly and is in good overall shape.
•    Acceptable: The item is fairly worn, but it continues to work perfectly. The signs of wear can include scratches, dents, and other aesthetic problems. The box and nonessential instructions may be missing or damaged, however discs for installed software are included. The item may be marked or identified, and show other signs of previous use.

Cell Phones & Service

•    New: Just like it sounds—a brand-new, unused, unopened product in its original packaging and with all original packaging materials included. The original manufacturer’s warranty, if any, should still apply, with details of the warranty included in the conditions comments.
•    Refurbished: A product that has been professionally restored to working order. Typically, this means the product has been inspected, cleaned, and repaired to meet manufacturer specifications. It may or may not be in its original packaging. The manufacturer’s warranty or the warranty of the company performing the refurbishing services may apply to the product and should be included in the conditions comments.
•    Like New: An apparently untouched item in perfect condition. The original plastic wrap may be missing, but the original packaging is intact. There are absolutely no signs of wear. It should be suitable for presenting as a gift.
•    Very Good: A well-cared-for item that has seen limited use but remains in great condition. The item and its instructions are complete and undamaged, but may show some signs of wear. The item works perfectly.
•    Good: The item shows wear from consistent use, but remains in good condition. The original instructions are included and are in acceptable condition. The item may be marked or identified, and show other signs of previous use. The item works perfectly and is in good overall shape.
•    Acceptable: The item is fairly worn, but it continues to work perfectly. The signs of wear can include scratches, dents, and other aesthetic flaws. The box and nonessential instructions may be missing or damaged. The item may be marked or identified and show other signs of previous use.

Toy & Baby

•    New: Just like it sounds. A brand-new, unused, unopened product in its original packaging and with all original packaging materials included. The original manufacturer’s warranty, if any, should still apply, with details of the warranty included in the conditions comments.
•    Like New: An apparently untouched toy item in perfect condition. The original plastic wrap may be missing, but the original packaging is intact. There are absolutely no signs of wear. Suitable for presenting as a gift.
•    Very Good: A well-cared-for item that has seen limited use but remains in great condition. The item and its instructions are complete and undamaged, but may show some signs of wear. The item works perfectly.
•    Good: The item shows wear from consistent use, but remains in good condition. The original instructions are included and are in acceptable condition. The item may be marked or identified, and show other signs of previous use. The item works perfectly and is in good overall shape.

Watches

•    Like New: This product may have been worn but shows no signs of wear. There are no visible scratches, scuffs, nicks, or dents to any part of the watch including crystal, bracelet and case. The watch is in perfect working order.
•    Very Good: The watch shows very slight wear with only minor scratches and scuffs on the bracelet or case but not on the crystal. In working order.
•    Good: In working order, shows visible signs of wear including scratches to the case and bracelet and/or minor scratches to the crystal. This wear can be polished out or repaired.
•    Acceptable: The watch does not have to be in working order, but can be fixed with only minor repair. Some scratches or dents noticeable on case, bracelet, and crystal.

Musical Instruments

•    New: Just like it sounds. A brand-new, unused, unopened product in its original packaging and with all original packaging materials included. The original manufacturer’s warranty, if any, should still apply, with details of the warranty included in the conditions comments.
•    Refurbished: A product that has been professionally restored to working order. Typically, this means the product has been inspected, cleaned, and repaired to meet manufacturer specifications. May or may not be in its original packaging. The manufacturer’s warranty or warranty of the company performing the refurbishing services may apply to the product and should be included in the conditions comments.
•    Like New: An apparently untouched musical instrument in perfect condition. The original packaging is intact. There are absolutely no signs of wear. Suitable for presenting as a gift.
•    Very Good: A well-cared-for item that has seen limited use but remains in great condition. The item and its instructions are complete and undamaged, but may show some signs of wear. The item works perfectly.
•    Good: The item shows wear from consistent use, but remains in good condition. The original instructions are included and are in acceptable condition. The item may be marked or identified, and show other signs of previous use. The item works perfectly and is in good overall shape.
•    Acceptable: The item is fairly worn, but it continues to work perfectly. The signs of wear can include scratches, dents, and other aesthetic problems. The box and nonessential instructions may be missing or damaged. The item may be marked or identified, and show other signs of previous use.