This deal has ended.
Buy.com has the Acomdata 1TB External Hard Drive for just $226.99. One terabyte is the equivalent of 1000 gigabytes, and large enough to suit most needs. It's compatible with both PC and Mac, features transfer rates up to 1.5Gbps, and has both USB and eSATA interfaces. Shipping is free, there is no sales tax (except CA, MA, MD, TN), and new Google Checkout users can get a $10 discount for signing up.