Adorama via eBay offers the Samsung 850 EVO 1TB Serial ATA 6Gb/s 2.5" Internal SSD, model no. MZ-75E1T0B/AM, for an in-cart price of $279.99 with free shipping. That's $10 under our mention from three weeks ago and the lowest total price we've seen. (It's also a current price best by $10.) It features read speeds of up to 540MB/s and write speeds of up to 520MB/s.
Of note, Micro Center offers it for the same price with in-store pickup.