I second Resistance: Fall of Man and LBP (there's still plenty of stuff to do and download in LBP even though the sequel is out). Ratchet & Clank Future: Tools of Destruction is an amazing game (no trophy support though, if that matters to you.) Midnight Club: Los Angeles is a decent driving game, as well as Motorstorm (not as good, imo). I never played Condemned 2, but it got decent reviews and is pretty cheap. Skate is a good game if you're into skating games. Fallout 3 and Grand Theft Auto 4 can be found pretty cheap as well.