how much will i get for an xbox 360 arcade and games and accessories?

i want to trade in my xbox 360 and all of my accessories and games. i want to sell it to disc replay, beacuse im pretty sure they pay more than gamestop. if anyone can give me an estimate in the amount of cash they would give me, i would greatly appreciate it. the things i would be selling are:
an xbox 360 arcade in great shape; never had the red ring of death, 3 microsoft brand wireless controllers, call of duty mw2, call of duty 2, the force unleashed, test drive unlimited, grand theft auto 4, and hawx. i am trying to save up for a netbook, and i am wondering how far the xbox and the collection of games will take me.

thank you,
PO3 Nieweglowski
USNSCC