Buy.com offers the Crucial 128GB M4 2.5″ Serial ATA 6Gb/s Internal SSD, model no. CT128M4SSD2, for $89.99 with free shipping ($0.70/GB). That’s $10 under our mention from three weeks ago and the lowest total price we’ve seen. (It’s also a current price low by $20.) It features read speeds of up to 415MB/s and write speeds of up to 175MB/s.