TigerDirect offers the Drobo FS 5-Bay Gigabit Ethernet Network Attached Storage Enclosure, model no. DRDS2A21, for $399.99 with free shipping. That ties our April mention as the lowest total price we've seen for this NAS enclosure. (It's also a current price low by $9.) This enclosure can hold up to five Serial ATA hard drives for up to 16TB total.