Adorama via eBay offers the Drobo 5N 5-Bay Network Attached Storage Array, model no. DRDS4A21, for $399.99 with free shipping. That's $50 below our April mention and the lowest total price we could find by $49. This enclosure can support up to five plus one mSATA hard drives (not included) for a maximum capacity of 20TB. It features Gigabit Ethernet, RAID support, and BeyondRAID technology, which chooses the correct protection algorithm based on data availability needs and allows switching from single to dual disk redundancy with a single click.