Guitar hero on tour, how much would i get for it on gamestop????

ok so i bought guitar hero on tour for the ds when it came out, and well...i found it was a piece of *beep* and i hate it, it was a waste of my dinero! >=( but anyways, how much would i get for it if i sell it at gamestop??? along with the guitar strap, game, and box and w/e (except the stickers, i want the stickers) so how much would i get?????