Amazon offers the Samsung 256GB 840 Pro Series Serial ATA 6Gb/s 2.5" MLC Internal SSD, model no. MZ-7PD256BW, for $139.99 with free shipping. That's the lowest total price we could find by $37, although we saw it for $5 less in October. It features read speeds of up to 540MB/s and write speeds of up to 520MB/s.