I happened to be in the mall this past weekend and stopped in at a GameStop to see what their trade-in values were for consoles (mainly the one's I own). Here is what I was told. Slimline PS2: $50 Nintendo GameCube: $25 Sony PSP: $60 I was not actually going to trade in the PSP, but I am considering getting rid of the PS2 and GameCube, but at those trade-in values it is not going to happen. All of the consoles are pretty new and still have the aftermarket warranty. I will keep them until that runs out. They sell the Slimline PS2 in their site for $129. GameCube for $100. PSP for $249.