Ending tonight, TigerDirect offers the Seagate Barracuda 4TB Serial ATA 6Gb/s Internal Hard Drive, model no. ST4000DM000, for $189.99. Coupon code "JCI89488" cuts it to $169.99. With free shipping, that's $0.04/GB and the lowest total price we could find by $25, although it was $10 less two weeks ago. It runs at 5900 rpm and features a 64MB cache.

newegg offers it for the same price via code " EMCYTZT3383".