Newegg offers the Mushkin 512GB Enhanced ECO2 Serial ATA 6Gb/s 2.5" Internal SSD, model no. MKNSSDEC512GB, for $109.99 with free shipping. That's tied with our March mention as the lowest total price we've seen. (It's also a current low by $20.) It features read speeds up to 560MB/s and write speeds up to 305MB/s.