Buy.com offers the Kingston HyperX 120GB Serial ATA 3Gb/s Internal Solid State Drive, model no. SH100S3/120G, for $219.95. This $40 mail-in rebate cuts it to $179.95. With free shipping, that's $1.49/GB and the lowest total price we could find by $48. This 2.5" drive features up to 550MB/s read and 510MB/s write speeds. Rebate expires November 10.