B&H Photo-Video offers the Toshiba 5TB Serial ATA 6Gb/s Internal 3.5" Hard Drive, model no. PH3500U-1I72, for $144.99 with free shipping. (Amazon charges the same.) That's the lowest total price we could find by $11, although it was $5 less via pickup last month. It runs at 7,200 rpm and features a 128MB cache.