How much money would i get if i sold my wii, games, and accessories at gamestop?

how much would i get if i sold my wii, 2 wii remotes, 2 num chucks, and these games super mario galaxy 2, new super mario bros wii, spiderman web of shadows, naruto clash of ninja revolution, madden 10, mario strikers charge, super smash bros brawl, call of duty:modern warfare, and call of duty: black ops? im trying to sell all of this to get a sony ps3 so if anyone can help tht would be great thanks !