Zelda Phantom Hourglass Xbox

Trade in for original psp and ds with 11 game together for trade in at eb games/gamestop?

Ok so i have a original Psp and ds and I'm wondering if i could maybe trade it in for a xbox 360 pro console

I have these 8 ds games:
Zelda:Phantom Hourglass
Pokemon Diamond
Mario Hoops 3 on 3
Mario Kart
Super Mario 64
Ping Pals
Assassin's Creed
Yoshi Touch and Go

And i have a 2gb psp memory card with 3 games:
Nba 07
Ratch and clank
Final Fantasy crisis core

So how much money do u think i would get if i sold it to eb games? and store credit i'd get?

Thanks

if you trade specifically to get the Xbox they have a summer tradein special now, take them in and I think it's a set price ( like $299 or something ) with a system trade and then you get game credit as well
call the store or just take them all in ( I think the deal ends today or this week )

Zelda Phantom Hourglass Xbox