The first thing to check for before bidding is to look for the shipping cost, that can be found at bottom of sale or there'll be a shipping  tool somewhere near bottom, that you put your Zip Code into.. You are looking to save money right? So Media Mail at USPS is about $ 2.19 shipping for 3 sets of used WoW -,without the useless outer ,to get shipped from coast to coast.
   Don't pay over $5.00 shipping for this game unless the total of bid and shipping is under $26.00 for shipping in USA..  If you can't see the shipping DON"T BID! Look at the seller reputation, two or three buyers, some no longer registered may be a sign the game or time card are hot!!.Send them a question if you must. Such as ''What's the total with shipping?"or "Do I get your account # and password as you say you have tested this game?"..Also look to see if they have a Paypal minimum. Some UK dealers want 10 sterling minumum, to use Paypal that's almost $20. USD

 Next look to see if it is used,sometimes  new or used is not checked off. I don't know why Ebay lets sellers leave it like that. I will fire off a question to seller if I see it listed that way. If you get no answer stay away!! If it is used ,does it have a 10 or 14 day guest pass CD key, That lets you at least play for a while before buying a full use CD key.  A good price for a used WoW CD set w/10day guess pass is $10.00 USD total.
    If they played the game >the CD key isn't valid anymore, but you will be able to load the game onto a harddrive with used the CD-,if you already have an account or buy a WoW game >"CDkey only", on Ebay.
  If you buy a CD key with game from UK, it  probably is for the Euro Servers ,you will have a lot of latency or lag to play. Not as many EuroWoW pc CD's are put up on  Ebay, so expect to pay more and no discounter (brick& mortar) sell the Euro version in USA that i'm aware of. Try looking on Ebay.co.UK

 The only way to get a new CD-key is to buy a new World of Warcraft PC Game or "WoW-CDkey only". They sell for around $23.98 total ,new on Ebay  and Amazon ,if you get good deal. They come with a 10 day guest pass unless noted otherwise. Big discounter  brick and mortar stores sell the WoW for $19.98 USD

 If I was a new player wanting to try WoW I would buy a 60 day Time Card .Inside the 60day Time Card case is a 10day guest pass , $26.00 USD total is a good deal  for a Time Card on Ebay.

Some sellers will Email your CD key # make sure in a question to seller, you ask them if they will Email the Guest pass CDkey # too.

   If you quit the game after 10 days the time card is easy to sell on Ebay, you should get $28-$32 plus shipping .You can Email the # to buyer ,state in your info, if shipping is non refunded if Emailed. Also the WoW web site has links to a free trial and a digital download.

 Big Discount stores sell WoW timecards as of 08-26-06 @ $29.88+tax, It comes with a 10 day guest pass . A used WoW CD set can be found for as low as $.4.01 total on Ebay without any Permanent CDkey or10day guest pass CD key.

 If you miss the winning bid ,check the sellers other items for sale at his Ebay store by clicking on his Ebay user name. Some times they have a endless number of the same item listed a few days or hours apart.

 See you in WoW . Hope this saves you some time and money   : )