This deal has ended.
Buy.com has the Fantom Titanium 500gb External Hard Drive for only $119.95 after a $25 mail-in rebate valid through 5/8. Plus, shipping is free and there is no sales tax (except CA, MA, MD, TN). $0.24 per gigabyte is as good as it gets for external storage. New customers can use this $5 off $50 coupon; new Google Checkout users can get a $10 off discount for signing up (you can't get both).