newegg offers the refurbished Western Digital Scorpio Blue 250GB Serial ATA 3Gb/s 2.5" Internal Notebook Hard Drive
, model no. WD2500BEVT, for $39.99
with free shipping
($0.16/GB). That's $10 under the lowest total price we could find for a new one today. It runs at 5400 rpm and features an 8MB cache.
Note: A 90-day warranty applies, but it's unclear who backs it.