B&H has the HGST 4TB Deskstar Coolspin 3.5″ SATA III internal drive on for $152 shipped. That’s $38 off the regular listing of $190 and the lowest price we can find on this Hitachi drive. The Coolspin model is marketed as a quiet, low power consumption 5400 rpm drive that will work in a desktop or something like a Synology NAS device. It has received a 4.7/5 star review from over 60 B&H customers and a very similar rating on Amazon.
HGST 4TB Deskstar Coolspin 3.5″ SATA III internal drive: $152 shipped (Reg. $190)