Game trading site, join and get your first game free. No joking.  
http://www.goozex.com/trading/asp/referral.asp?idr=6144283433866 

"Swaptree.com is an innovative new website where you can instantly trade the books, CDs, DVDs, and video games you are finished with for the ones you want, all for free." I really like this site the only thing I do not like is that it only offers one game for one game trades. The only option you have if think the total value is different is to reject the auto trade.
http://www.swaptree.com/WebFrmNewUserHomePage.aspx?ReferralUserName=bryanindiana 


Please visit me at my absolute favorite game trading site (free, unless you want access some extra features). I have lots of game to trade.
http://gametz.com/user/bryanindiana.html