SOLD OUT!
The Buy.com deal (see Top 3 Deals) is actually better after you consider shipping and taxes.
If would rather order from Kmart, you can use an online 10% off code on an Xbox 360 Premium.
$359.99 (after $40 discount)
+ $7.67 shipping
= $367.66
+ $25.20 tax (assuming 7% tax rate)
=$392.86
Steps:
1) Head on over to Kmart
2) Apply the coupon code: 004687478018 to get 10% off your whole order
[via Xbox360Fanboy]
[Thanks Skeat & bushe]