Buy via eBay 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. (Add it to your cart to see this price.) That's $10 under yesterday's mention and the lowest total price we could find by $12. It features read speeds of up to 540MB/s and write speeds of up to 520MB/s.