This deal has ended.
Buy.com has the Maxtor 500GB One Touch 4 External Hard Drive, now priced at $146.79. Shipping is free and there is no sales tax (except CA, MA, MD, TN). $0.29 per gigabyte is a nice deal on external storage, it's compatible with both PC and Mac, and it comes with the one-touch backup feature. Plus, new Google Checkout users can get a $10 off discount for signing up.