Buy.com offers the Crucial 128GB M4 2.5″ Serial ATA 6Gb/s Internal SSD, model no. CT128M4SSD2, for $99.99 with free shipping ($0.78/GB). That’s tied with last week’s mention as the least expensive 128GB 6Gb/s SSD we’ve ever seen without rebate hassles. (It’s also a current price low by $10.) It features read speeds of up to 415MB/s and write speeds of up to 175MB/s.