Fantastic 4 Silver Surfer Xbox

How much money do you think gamestop/ebgames will give me for these?

xbox 360 games:
fifa 09, madden 09, GTA IV, nba live 07, nba live 08, Project Gotham Racing 4, Perfect dark zero, Fantastic 4 Rise of the Silver Surfer.

gamestop doesn’t give shite for game nowadays sell them online or something you’ll get more.