PS2 Selling Price

I'm got my PS3 finally so no need for my PS2 since my PS3 plays all my PS2 games just fine. I'm going to be selling my PS2 what do you think a Gamestop would give me for it? I know it's not a lot and I tried asking on the phone but he's like we can't do that. So I'm just asking from ppl who sold they're PS2 at Gamestop.