TigerDirect offers the Seagate 4TB Barracuda Serial ATA 6Gb/s Internal Hard Drive, model no. ST4000DM000, for $169.99. Coupon code "MFN124162" drops it to $139.99. With free shipping, that's tied with our expired mention from two days ago and within a buck of the lowest total price we've ever seen. (It's a current price low by $15.) It runs at 5900 rpm and features a 64MB cache.