I actually did this exact thing a week ago. I sent in everything except for the Tomb Raider codes and the outer box (which would have the wrong UPC# anyways, didn't want to risk it) and it was accepted as Good. Though I don't know how much can be missing to still get an Acceptable.
This seller has $60 Gamestop cards for $50, limit 3 per buyer. I just bought a few with my recently acquired ebay credit, and the great wheel continues to turn.
http://www.ebay.com/itm/142005542312
I submitted one for the 32gb card and it already says "processing..." does that mean they're going to cancel it?
Also, Assassin's Creed: Ezio Trilogy for PS3 is selling for $23 right now and trading for $24.
2/28
(NDS) New Super Mario Bros - 14.00
(PS3) Dead Space - 10.00
(PS3) Dead Rising 2: Off the Record - 6.00
(360) Dishonored - 18.00
(360) Sleeping Dogs - 17.00
12/8/12 base value(adjusted)
PS3 Portal 2 $10.00(21.00)
PS3 Assassin's Creed $4.00(15.40)
360 Namco Museum Virtual Arcade $6.00(15.60)
$15 for the first AC? Madness.
5/18/12
PS2
Shadow of the Colossus - 3.50
GTA San Andreas - 6.00
DS
Mario & Luigi Bowser's Inside Story - 7.00
PSP
Sega Genesis Collection - 3.50
360
Fallout New Vegas - 5.00
Soul Calibur IV - 3.50
Child of Eden - 7.00
PS3
Saints Row 2 - 7.00
Took in 8 games because I apparently can't...