Anyone know gamestop trade in values?

I'm looking to trade a few things in for an online redeemable gift card. What would these things be worth?

Halo wars LIMITED EDITION
halo 3
need for speed pro street (x360)
dbz: budokai tenchaichi (i have no fuckin idea how to spell it, PS2)
Nintendo DS (the console)
gameboy advance SP (console)

lots of DS games like:
nintendogs (came with it, i didnt buy it)
super mario 64 ds
harry potter goblet of fire
that mario game that was like mario bros, i think its mario bros ds
more...

so... does anybody have any idea what that would be worth for in store credit? can i get that in a gift card?

 

Unpredictable, but be warned GS is known for ripping you the fuck off...They gave me $3 for GH: WT...when it was new...BS

Edit: You'll probably get 25-30 for that list.

 

thats bullshit. Halo wars limited edition... a DS... wtf? and btw, they have a deal, trade in 3 xbox games and you get 10 dollars extra trade in value.

 

Dude gamestop totally rips you off, youll get way more money from sellin em on ebay...trust me

 

They fucked me, when I sold a bunch of games, they gave me 33 cents for one and sell it for $15

 

Yea, don't expect to get a bunch of money off them games, at least from Gamestop. Your best bet would be Amazon, or Ebay.

 

I think some of you guys are over-exaggerating. They gave me $15.00 for Halo 3. I mean yeah you could probably rip some guy on craigslist for like $25 but GameStop's "okay". I mean it's easier to sell.