Seagate ST2000DL003 Barracuda 2TB 3.5″ Internal Hard Drive for $99.99 after a $15 rebate. Shipping is $2.29 for a total of $102.28 shipped. Here is a screenshot for your reference. Alternatively, it is available at Amazon for $109.99 shipped. Note that it comes in OEM packaging, which means no pretty retail box and marketing materials but is otherwise identical. It features 5900 rpm speed, 64MB cache, SATA 6Gb/s interface, and more. Most places have it for about $120.