PSP Trade-in at GAME - Info

[Robbie]

Does anyone have a rough idea of what I'd get at GAME (Trade in) for:

PSP Value Pack (Not slim & lite)
The Simpsons Game
Driver '76 Game
GTA: VCS Game
The Warriors Game
Crazy Taxi: Fare Wars Game
Crash Tag Team Racing Game
GTA: LCS Game
Gangs of London Game
Modified Air Combat Heroes Game
Need for Speed Most Wanted 5.1.0 Game

All PSP Games obviously.

Thanks and +rep for help ;)