Buy.com offers the Crucial M4 256GB Serial ATA 6Gb/s 2.5" Internal SSD, model no. CT256M4SSD2, for $159.99 with free shipping ($0.62/GB). That's $5 under last week's mention and the lowest total price we've seen. (It's a current low by $35.) It features read speeds of up to 415MB/s and write speeds of up to 260MB/s.