Check Gizmodo's deals of the day. There's always some deal on HDD's. Just saw on today for 2TB for $81. THAT'S a deal. One of the main reasons Giz is on my RSS feed.

http://gizmodo.com/5681608/gadget-deals-of-the-day?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+gizmodo%2Ffull+%28Gizmodo%29