Western Digital Scorpio Black WD5000BPKT 500GB 7200RPM SATA Laptop Hard Drive for $59.99 after code EMCKFJH45. Shipping is $1.99 for a total of $61.98 shipped. Here is a screenshot for your reference. Note that it comes in OEM packaging, which means no pretty retail box but is otherwise identical. Most places have this drive for about $72.