If you have a Costco membership and three computers that you want to upgrade to Windows 7, then you can get a giant wooden palette of operating systems for $135 – this same three-pack is priced elsewhere at $150 while a single version of the upgrade runs $120.

I’ll let you do the math on this one but needless to say, it ends up being a pretty good deal for a multi-computer household. You may also consider getting the three-pack from Staples and using one of the store’s relatively ubiquitous “$30 off a purchase of $150 or more” coupons if you happen to have one of them in your possession. That’s an even better deal, although you’ll need to track down the coupon of course.

Windows 7 Home Premium Upgrade Family Pack 3-PCs [Costco.com via FatWallet]