Or even better, find something for around $21 at Buy.com that also has a rebate. Then you will get the $30 off $150, plus two rebates!
If you need tax software, a good prospect is Turbo Tax plus Quicken 2001 Basic. This would cost you $50, but there is a $35 rebate for the combo. This means $128 30GB drive plus $50 Quicken combo = $178. Minus $30 Buy.com coupon = $148. Minus $35 Quicken/Turbo rebate = $113. Minus $30 Quantum rebate and your final cost would be $73. Add about $8 shipping and your final cost is around $81 for a fast 30GB drive, Turbo Tax and Quicken 2001 Basic.
In my opinion, the key to these buycom coupons is to buy something, or multiple items, that have additional rebates.
I have had excellent luck with Quicken rebates. Fast and reliable. Quantum rebates are slower than snot.