Amazon offers the Samsung 850 EVO 1TB Serial ATA 6Gb/s 2.5" Internal SSD, model no. MZ-75E1T0B/AM, for $359.99 with free shipping. That's $8 below our mention from three days ago and the lowest total price we've seen. (It's a current low by $8, outside of the mention below.) It features read speeds of up to 540MB/s and write speeds of up to 520MB/s.
Of note: Newegg also has it for $359.99, although shipping adds 99 cents.