Fry's Electronics offers the Hitachi GST 4TB Deskstar Coolspin Serial ATA 6Gb/s 3.5" Internal Desktop Hard Drive Kit, model no. 0S03359, for $129 with free shipping. That's tied with our mention from three weeks ago for the lowest total price we've seen. (It's a current low by $20.) It runs at 5400 rpm and features a 32MB cache.