Western Digital Caviar Black WD1002FAEX 1TB Internal Hard Drive for $79.99 shipped after code EMCYTZT2717. Here is a screenshot for your reference. It features 7200 RPM, 64MB cache, and SATA 6Gb/s interface. Note that it comes in OEM packaging, which means no pretty retail box but is otherwise identical. Note that this is the black edition of the Western Digital product line, which comes with a 5-year warranty and is more performance oriented. Most places have this hard drive for about $94.