All the used games at your local Blockbuster are bogo (buy one get one) fyi. I picked up 10 games for 80$. I don't have the PS3 yet, but couldn't let that kind of deal go.
GTA4, Sega Rally Revo, NCAA 08, Madden 08, N4S Carbon, N4S Pro Street, Transformers (I hear it's not great though, oh well), Ridge Racer 7, The Simpsons, Virtua Fighter 5
BTW, all games are guaranteed for 30 days of defects.
Edit: also in the bogo section are PSP, PS2, Xbox 360, etc.