For Prime members only, Amazon offers the Crucial MX100 Series 512GB 2.5" Serial ATA 6Gb/s SSD, model no. CT512MX100SSD1, for $159.99 with free shipping. That's $11 under our May mention and the lowest total price we've seen. (It's a a current low by $40.) It features read speeds of up to 550MB/s and write speeds of up to 300MB/s.

Also for Prime members only, Amazon offers the Crucial MX100 Series 256GB 2.5" Serial ATA 6Gb/s SSD, model no. CT256MX100SSD1, for $79.99 with free shipping. That's $13 below our May mention and the lowest total price we've seen. (It's a current low by $29.) It features read speeds of up to 550MB/s and write speeds of up to 300MB/s. Both deals end today.