Western Digital Scorpio Blue 320GB 5400RPM Laptop Hard Drive for $47.99 Shipped
Western Digital Scorpio 320GB 5400RPM Laptop Hard Drive for $47.99 shipped after a $10 rebate. Here is a screenshot for your reference. Note that it comes in OEM packaging, which means no pretty retail box and marketing materials but is otherwise identical. Most places have it for $57 or more.
