I'm thinking of trading in Madden 25 and maybe Knack at CEX. Can get £32 each for them. I got them originally because they I was pretty much forced to by GAME, but now I have FIFA 14, I don't think I'll have the time to play Madden. Might try and blast through Knack on Easy this weekend just to complete it, and then trade it in. I have yet to make a good start on Killzone too.
Shame there's no other decent games I'm interested though. Have already played AC, BF4 and CoD on the PC, while I can borrow NBA 2K14 from my mate.