OK, so I ordered a used 120gb OEM HDD for $60 shipped. Hopefully it is good.
So after all is said and done, here is how my cheap Arcade 360 deal has gone down:
$215 Arcade 360 from Wal-mart (with a $100 gift card)
$0 COD MW2 from Wal-mart (cost me $66 worth of my original gift card, but got another $20 GC)
$0 12 Month Live from Wal-Mart (cost me the $20 GC plus another $22 from other GC)
$20 At EB/GS for Madden 08, PGR3, GRAW and PREY
$14 to exchange GRAW for DIRT
$32 for Gears of War and Orange Box at Target
$54 at BB/GR for Halo 3, Bioshock, Army of Two, GTA IV and Assassins Creed
$60 for a 120gb HDD
For a grand total of $395
Arcade System, 120gb HDD, 12 months of Live and 11 Pretty cool Games
EDIT: still have like $10 left on my WM Gift Card.