Amazon offers the Samsung 850 Pro 256GB Serial ATA 6Gb/s 2.5" Internal Solid State Drive, model no. MZ-7KE256BW, for $129 with free shipping. That's a buck below our mention from two weeks ago and the lowest total price we've seen. (It's a current low by $21.) It features read speeds of up to 550MB/s and write speeds of up to 520MB/s.