Newegg offers the Western Digital 3TB Red Serial ATA 6Gb/s Internal Hard Drive 4-Pack, model no. WD30EFRX, for $399.99 with free shipping. That's $100 per hard drive, tied with our November mention, and the lowest total price we could find for this quantity by $60. (For further comparison, we saw a 2-pack for $215 with free shipping last month.) Each drive features a 64MB cache and runs at 7200 rpm.