Western Digital Red WD30EFRX 3TB Internal Hard Drive for $124.99 shipped after coupon code EMCPHPC23.  Here is a screenshot for your reference.  Alternatively, it is available at B&H for $129.00 shipped.  It features 3D Active Balance Plus, IntelliPower 64MB cache, SATA 6.0Gb/s interface, and NAS compatibility. Most places have it for about $149.