Toshiba DT01ACA200 2TB Internal Hard Drive for $67.49 shipped after promo code NAFSAVETENDEC6W.  Here is a screenshot for reference. It features 7200 RPM, 64MB cache, and uses SATA 6.0Gb/s interface. Note that it comes in OEM packaging, which means no pretty retail box but is otherwise identical. Most places have it for about $99.