Amazon offers the Samsung 500GB 840 EVO Series Serial ATA 6Gb/s 2.5" Internal SSD, model no. MZ-7TE500BW, for $249.99 with free shipping. That's the lowest total price we could find by $20, although we saw it for $15 less four days ago (now expired). It features read speeds of up to 540MB/s and write speeds of up to 520MB/s.