The sports games are mostly the ones I try to stay away from. As soon as the new game hits, the old ones are worth about $.75
I've got College Hoops 2K7 and the newest WWE title. They just happened to be sitting on top of the lot I just got in today. Not sure what I've gotten for them in the past, but I'm consistantly $5 - 10 less than EBGames/Gamestop.
Drop me a email with a want list and I'll see what I can do. I've got a few more boxes of used stuff coming in next week.