Amazon offers the Seagate Momentus XT 750GB 2.5" SATA 6Gb/s Internal Solid State Hybrid Drive, model no. ST750LX003, for $139.99 with free shipping. (newegg charges the same.) That's $0.19/GB and the lowest total price we could find by $8, although it was $3 less in May (since expired). This 7200 rpm drive features a 32MB cache. It also includes 8GB of SLC NAND solid state flash storage.