Samsung SpinPoint M8 HN-M101MBB 1TB Laptop Hard Drive for $54.99 shipped.  Here is a screenshot for your reference. It features 8MB cache, 5400 RPM, and uses SATA 3.0Gbps interface. Note that it comes in OEM packaging, which means no pretty retail box but is otherwise identical. Most places have this laptop hard drive for about $79.