mwave offers the OEM Samsung Spinpoint M7E 2.5″ 640GB Serial ATA 3Gb/s Internal Notebook Hard Drive, model no. HM641JI, for $54.99 with free shipping. That’s $0.09/GB, $3 under our October mention, and the lowest total price we could find by $4. This 2.5″ drive runs at 5400 rpm and has an 8MB cache.

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