Buy.com offers the Iomega StorCenter px4-300d External Network Attached Storage Enclosure
, model no. 35098, for $529.99
with free shipping
. That's the lowest total price we could find by $79. It features an Intel Atom dual core 1.8GHz CPU, support for up to four SATA hard drives up to 12TB (no hard drives are included), RAID 0, 1, 10, 5, and 5+1, Gigabit Ethernet, two USB 2.0 ports, one USB 3.0 port, and more.