Western Digital VelociRaptor 300GB 10,000 RPM SATA Internal Hard Drive for $189.99 shipped after this $30 rebate. Here is a screenshot before the $30 rebate for your reference. Note that it comes in OEM packaging, which means no pretty retail box but is otherwise identical. For the technically inclined, it has a rotational speed of 10000 RPM and very fast seek time of 4.6ms vs about 9ms for most SATA hard drives. Most places have it for $219 or much more.