Ending today, J&R offers the Hitachi Deskstar 4TB Serial ATA 6Gb/s 3.5" Internal Hard Drive, model no. 0S03364, for $279.99. Coupon code "JRJUNE" cuts it to $274.99. With free shipping, that's $0.07/GB and the lowest total price we could find by $5. (Most stores charge over $300.) This drive has a 5400 rpm spin rate and features a 32MB cache.