(adsbygoogle = window.adsbygoogle || []).push({}); im going to sell/trade in my black ops but what should get?

That depends what type of game you want. Those games are all entirely different. But if *I'm* selling an FPS I know I don't want one in return. FIFA gets boring, rent it or download a demo if you wanna play it badly. GTA is a very addictive game with a strong story (As you haven't made it clear which I don't think it matters all of them on PS3 are enjoyable). LBP2 is the way to go if you enjoyed the first one. But personally I would get GTA as it has *In my opinion* greater replay-ability value.

Killzone 3

Killzone 3

Think i'll get both GTA and Killzone 3 thnx

Killzone 3 or LBP2 ( Easy Plat trophy )

It all depends what kind of game you want. Don't return a FPS and get another one. Try LBP2 or GTA.