This deal has ended.
Buy.com has the Acomdata 1TB External Hard Drive for just $120.84. It's compatible with both PC and Mac, features fast transfer rates up to 1.5Gbps, and has both USB and eSATA interfaces. Plus, you're only paying about $0.12 per gig. Shipping is free, there is no sales tax (except CA, MA, MD, NY, TN), and new customers can use this $5 off $100 coupon. Alternately, it's at Radio Shack for $109.99, but before sales tax and shipping.