I just got an XBOX for Christmas and have now begun to accumulate more games than I need. I trade some, but sothers I'd just prefer to sell-back/trade-in to the local stores. What is the typical buy-back percentage stores such as EB, Software etc., FYE, and local shops buy games back at and who has the best deal? I know sports games lose their value fairly quickly (I got $16 store credit for Madden 2003 last month at Software Etc.), but what about greatest hits titles and premium titles (Splinter, Nightfire, Vice City, and the like)?