Buy.com offers the Crucial 256GB M4 Serial ATA 6Gb/s 2.5″ Internal SSD Solid State Drive, model no. CT256M4SSD2, for $199.99 with free shipping ($0.86/GB). That’s tied with our expired mention from yesterday and the lowest total price we could find. It features read speeds of up to 500MB/s and write speeds of up to 260MB/s.