i had NFS carbon on xbox360 (finished in 3 days i was THAT addicted) anyway it took me a while as well because i accidentally bought the same car twice and had to sell one. what you do is go to the view cars menu and then you press (well you have a psp so i don’t know the buttons) “Y” or “X” i cant remember which one and it takes yo to the career options. it should tell you in the corner just look around when your looking at your cars. have fun with this sick awesome game.

my brother has the game and he said there is no way to sell them u have to keep them