Amazon offers the Crucial MX100 Series 512GB Serial ATA 6Gb/s 2.5" Internal SSD, model no. CT512MX100SSD1, for $198.99 with free shipping. That's tied with our mention from two weeks ago as the lowest total price we've seen. (It's a current low of $10.) It features a 9.5mm adapter, read speeds of up to 550MB/s, and write speeds of up to 500MB/s.