Ends today. Newegg has the Western Digital Red WD20EFRX 2TB 64MB 3.5" SATA3 Internal Hard Drive for $160 - $50 off with coupon code EMCJJNA46 [Exp 11/11] = $110 with free shipping. Usually goes for $120+. Made for 24x7 operating environments and as a NAS drive, the WD Red line features dual-plane balance control and consumes less than 4W of power at idle.
Also $110 @ Amazon at the moment.