Oceanside Store via eBay offers the Western Digital 300GB VelociRaptor 10K Serial ATA 6Gb/s 3.5" Internal Desktop Hard Drive, model no. WD3000HLHX, for $54.99 with free shipping. That's the lowest total price we could find by $10. It's actually a 2.5" drive encased in a larger heatsink that fits into a standard 3.5" drive bay. It operates at 10,000 rpm and features a 32MB cache.