B&H Photo Video offers the Toshiba Q Series 512GB Serial ATA 6GB/s Internal SSD, model no. HDTS251XZSTA, for $199 with free shipping. That's $40 below our June mention and the lowest total price we've seen. (It's a current low by $221.) It features read speeds of up to 552MB/s and write speeds of up to 501MB/s.