I will give you my personal opinion on what Gamestop will more than likely say bout these games:
Pokemon Diamond ($15)
Lost Planet ($8)
Spider Man PS2(Movie version) ($3)
Crash Bandicoot GBA ($3)
Prince of Persia Revelations PSP ($7)
Naruto Ultimate Ninja 1 ($5)
Midnight Club 3 Xbox ($3)
The Matrix Path of Neo Xbox ($3)
Those are my rough estimates and to be honest when I guess Gamestop's trade in value on a game it turns out completely right. Those games that I estimated you best believe that they will resell those at a higher price//lol//my estimate you will come close to $40 something and probably a little more if you use your EDGE card.
A easier way is to go to their site and look up the game and see how much they are actually selling it for//and slash off probably $10 or $15 dollars of that and whatever is left//that should be your trade-in value.
For example: Lost Planet: Extreme Condition $18- $10----> you get a close to $8 worth of trade in for that game.
