Today only, Amazon offers the Seagate 4TB Serial ATA 6Gb/s 3.5" Solid State Hybrid Hard Drive with 8GB SSD, model no. ST4000DX001, for $139.99 with free shipping. That's tied with our summer mention as the best price we've seen; it's the lowest total price we could find by $30. It features a 64MB cache and runs at 5900 rpm.