This deal has ended.
Buy.com has the Fantom Titanium 250gb External Hard Drive for only $49.95 after a $25 mail-in rebate valid through 6/22. Plus, shipping is free and there is no sales tax (except CA, MA, MD, TN). This is the best deal yet and just under $0.20 per gigabyte. Of note: new Buy.com customers can use this $5 off $50 coupon and new Google Checkout users can get a $10 off discount for signing up (you can't get both).