I wanna sell 6 gba games and a gba sp spongebob edition.How much money would i get if i sold them to gamestop?

The gba advance sp comes with a charger and the six games r quad desert fury..a gameboy advance video nicktoons colletion volume 2...tetris worlds...nicktoons freeze frame frenzy and spongebob squarepants battle for bikini bottom( 2 games in one)... harry potter... and backyard football 2006|||150 $ i called it in.