Help make deal better for MS space bucks Free ship Buy.com?

[Advocatus]

Previous users of Google Checkout via www.buy.com should have received a $25 off of $75 offer via email. That math looks like this

4000 Point Card
$49.99
80 points per dollar

1600 Point Card
$19.99
80 points per dollar
-----------------------------------------
So here is the deal buy
4000 point card + 2 1600 point cards
$49.99 + $19.99 + $19.99 = $89.97 (-$25) = $64.97
(plus shipping likely)

7200 points
$64.97 (plus shipping)
110 points per dollar
27% off

HOWEVER dumb ass www.buy.com charges $11.76 to put three cards into an envelope... changing the deal to...

7200 points
$64.97 (plus $11.76 shipping)
94 points per dollar
14% off

If we could find a deal for free shipping that would be hawt. (plus link through CAG for Cheapy, or through FW for fatcash)