RMT Sites for MMORPGs
Interesting round-up and review of 10 third-party real money trade (RMT) sites.
MMORPG Service Reviews 2007
http://mmorpg-service-review.toptenreviews.com/
Not surprisingly, IGE tops the list. The summary table lists sample pricing for each site, like how much 500 gold costs in WoW. The reviews also cover which sites allow players to sell or trade items to the third-party sites.