Western Digital Caviar Blue 640GB 16MB Cache Interal Hard Drive for $59.89 Shipped

Western Digital Caviar Blue 640GB 7200RPM 16MB Cache Internal Hard Drive for $59.89 shipped.  Here is a screenshot for your reference.  This drive uses a high-density 2-platter design for better performance while reducing power consumption.  Note that it comes in OEM packaging, which means no pretty retail box and marketing materials but is otherwise identical.