Newegg offers the Samsung 850 Evo 500GB Serial ATA 6Gb/s 2.5" Internal SSD, model no. MZ-75E500B/AM, for $149.99 with free shipping (select economy shipping during checkout). That's $5 under our expired mention from three days ago and the lowest total price we've seen. (It's a current low by $17.) It features read speeds of up to 540MB/s and write speeds of up to 520MB/s.