via eBay offers the Samsung 256GB 840 Pro Series Serial ATA 6Gb/s 2.5" MLC Internal SSD, model no. MZ-7PD256BW, for $149.99 with free shipping. (Amazon charges the same.) That's the lowest total price we could find by $20, although we saw it for $10 less bundled with a $21 credit last month. It features read speeds of up to 540MB/s and write speeds of up to 520MB/s.