This deal has ended.
Buy.com still has the 1TB Cavalry External Hard Drive (model CAUM3701T0B) on sale for $124.98 after this $15 mail-in rebate (expires 9/29). Plus, delivery is free and there is no sales tax (except CA, MA, MD, TN). 1TB (terabyte) is the equivalent of 1000GB, so you're paying just over $0.12 per gig. And, this features one-touch backup and an aluminum chassis.