MMORPG In-game Sales

These are companies that make a profit in some way off the same of in-game items on MMORPGs for real $$s. The biggest of these will always be auction sites, but there are many companies established around the commercial venture as well.

Auction Sites:

http://www.ebay.com - Sale of most major MMORPG items except Everquest
http://www.playerauctions.com - Sale of Everquest items

Private companies:

http://www.irnewb.com - Everquest In-game sales
http://www.mysupersales.com - Everquest in-game sales