Not a particularly local option, but hey, Gamestop probably is the first place that comes to most people's minds when they're looking for a game for their Xboxes and Playstations. Yes, they're going to bug you about their customer program and they're not going to give you much for your used stuff, but there are occasionally some bargains to be found and they usually have what you're looking for. That's quite a bit, as it goes.
Runners up:
2. Bookmans Entertainment Exchange
3. Katana Games
