How much money is a PlayStation 2 with 9 games and 1 controller and 1 memory card worth at game-stop?

I wouldn't count on making a lot if I were you. I visited GameStop with a friend recently and most Ps2 games will earn you around 25-50 cents. As for the memory card and console, you might get $10-35 for the console and they probably won't even take memory cards. If they do, you won't get much. If you REALLY want to sell these items then I'd recommend finding a friend who wants them. Otherwise, there is not much else you can do.