Seagate Barracuda Green ST1500DL003 1.5TB Internal Hard Drive for $69.97 after using this $30 rebate. Shipping is $2.99 for a total of $72.96 shipped. Here is a screenshot before the $30 rebate for your reference. It features 5900 RPM, 64MB cache, and SATA 6Gb/s interface. Most places have this internal hard drive for about $99.