how much will i get for these games trade in price?

i will be trading in thesegame ingamestation or game anyone have any idea how much i will get for them

perfectdark zero

rainbow six Vegas

gears of war

halo 3 (just wondering, because imight trade it in so i can get call of duty4, anyone have a idea of what the trade in price might be in like a month for halo 3?)

Try calling your local Gamestop or EB Games.