Ending today, Western Digital Store cuts $20 off purchases of $100 or more (including some outlet items) via coupon code "CUSTWEEKSEPT". With free shipping, It's the best dollar-off coupon we've seen from this merchant this year. Some exclusions apply, and sales tax is added where applicable.

A best bet is the Western Digital VelociRaptor 300GB 10k Serial ATA 3Gb/s Internal Hard Drive (pictured), model no. WD3000GLFSRTL, for $109.99 after the above coupon. With free shipping, that's $0.37/GB, $30 under our August mention, and the lowest total price we could find by $80. 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 16MB cache.