JR offers the Hitachi Travelstar 500GB Serial ATA 3Gb/s 2.5″ Internal Notebook Hard Drive, model no. 0S02858, for $59.99 with free shipping. (Click through to JR to view this price.) That’s $0.12/GB and it’s the lowest total price we could find by $8. (We’ve listed this drive for $16 less after rebate in October, since expired). It runs at 7200 rpm.