How much will gamestop pay me for these ps2 games??

I have gta san andres and gta vice city, shadow the hedge hog, sonic mega collection, sims bustin out, and a few others about how much do you think they will pay me for them..Also I have a ps2..part of it is chipped/broke off (a small unimportant piece) how much do you think i can get for that. I know it wont be much but i am in need of cash fast.