How much money will EB Games/Gamestop buy my games for?

I want to sell these 5 Nintendo DS games:



Mario Kart DS

Pokemon Pearl

Metroid Prime Hunters

Yu-Gi-Oh GX Spirit Caller

Pokemon Mystery Dungeon: Blue Rescue Team



How much money will these games sell for?How much money will EB Games/Gamestop buy my games for?
Somewhere between $2 and $20 each.How much money will EB Games/Gamestop buy my games for?
also depends on if it has scratches.

thats what they mainly base it on.

and oldness of game.