Buy.com offers the OCZ Agility 4 512GB 2.5" Serial ATA 6Gb/s Internal Solid State Drive, model no. AGT4-25SAT3-512G, for $314.99 with free shipping. That's $0.62/GB, $8 under our mention from two weeks ago, and the lowest total price we could find by $65. This drive features read speeds of up to 420MB/s and write speeds of up to 410MB/s.