Pokemon Firered Xbox

Can GameStop buy an Xbox 360 used? What about games?

I have an Xbox 360 that I have used for only 2 months (nevertheless, used), but I was wondering if GameStop would or could buy it, and how much would you think I would get back for it, in cash...?

Also, I have 3 GameBoy Advance games (Pokemon Emerald, Pokemon FireRed & Pokemon Crystal) and a Nintendo DS game (Guitar Hero: On Tour), but barely used (as I said, used, nevertheless)
...Would/Could GameStop (or if there are any other stores) buy these games? If yes, how much do you think they would give in cash? If no, thanks anyway.

Dude don't do it try selling on the street or on the internet. You'll only get about 30bucks.

Pokemon Firered Xbox