Newegg offers the Seagate 6TB IronWolf NAS Serial ATA 6Gb/s 3.5" Internal Hard Drive for $164.99. Coupon code "EMCPUEV24" cuts it to $159.99. With free shipping, that's an all-time low and the best today by $44, excluding the mention below. It's designed for NAS systems and features a 128MB cache. Deal ends May 17.

A close price: Amazon charges $160.99 with free shipping