Newegg offers two Seagate 3TB Barracuda Serial ATA 6Gb/s Internal Hard Drives, model no. ST3000DM001, for $164.99 with free shipping. That's $82.49 per drive and the lowest total price we could find for this quantity by $12. (It's also the lowest per-unit price we've seen for this drive.) Each hard drive runs at 7200 rpm and features a 64MB cache.