Some simple and basic tips on how to list a patch:

• Most Important Tip: Type out the text that's on the patch into the listing description.  It is a main way that items are found and searched for by serious collectors and resellers.  If there's a council name, like XYZ Council, it's very helpful to put XYZ in the title.
• Second Most Important Tip: Always include a picture of the exact item.  Many Collectors look for very minor variations.  Pictures of the back may or may not be necessary.  If you got the time and the funds (like your own web hosting) then include them.  Just make sure your listing doesn't load too slow. 
• Third Most Important Tip: Don't manually end your auction early.  Really, really good items usually have a lot of last minute bidding in this catagory (aka sniping).  Look at the completed items and sort by
• Give the approximate measurements of either height and width or diameter.  Thickness (depth) is usually not important unless it's abnormal.
• Mention if the patch is fully embroidered (solid) or partially embroidered (usually twill ribbing). 
• What is it made of?  Cotton, Felt, Plastic, Leather, Metal, Woven, Silk.  There are also printed or dye sublimation patches. 
• If it is a felt patch that has moth eaten holes, mention that. 
• If the patch has a plastic coating on the back, mention it.  If the plastic backing has a logo imbeded in it mention that.  The logo usually tells the manufacturer and can lightly assist in identifying authenticity.
• Patches are called Badges in some places and Crests in others.   Some patches have been reffered to as medallions or emblems or insignia when they are designating a group or unit like a patrol or troop.
• Two common notations used that generate question: CSP stands for Council Shoulder Patch.  Flap Patch is a patch that was designed to go on a pocket flap.
• Collectors collect patches for different reasons.  Two people bidding on a patch could be bidding on it for completely different types of collections. 
• Patches are works of usuable art!