Adorama via eBay offers the Samsung 850 Evo 500GB Serial ATA 6Gb/s 2.5" Internal SSD, model no. MZ-75E500B/AM, for an in-cart price of $169.99 with free shipping. That's $14 under last month's mention and the best price we've seen. (It's a current low by $22.) It features read speeds of up to 540MB/s and write speeds of up to 520MB/s.