Seagate Momentus 5400 ST9640320AS 640GB 5400 RPM 8MB Cache 2.5" SATA 3.0Gb/s
Internal Notebook Hard Drive -Bare Drive
Link: http://www.newegg.com/Product/Product.aspx?Item=N82E16822148527
Next lowest price for this drive on Pricegrabber is $94.26 with shipping.
Equivalent Samsung drive: $79.99 @ Newegg
Equivalent Toshiba drive: $79.99 @ Newegg
Equivalent Western Digital drive: $84.99 @ Newegg
Lowest price I've seen yet for this 2.5" (notebook-sized) drive. No rebates,
just raw price goodness.