Amazon offers the Toshiba 4TB Serial ATA 6Gb/s Internal 3.5" Hard Drive, model no. PH3400U-1I72, for $112 with free shipping. (B&H Photo Video has it for the same price.) That's $3 under our August mention and the best deal we've seen. (It's also the a current low by $28, aside from the mention below.) It runs at 7200 rpm and features a 128MB cache.

A close price: Best Buy via eBay has it for $112.99 with free shipping.