CineRAID Home CR-H408 4-Bay RAID Enclosure for $89.99 shipped.  Here is a screenshot for reference.  This SATA drive enclosure features RAID 0, 1. 10, 3 and RAID 5, interfaces for USB 3.0, eSATA, and supports for multi-stream SD and compressed HD work flows.  More information about this enclosure is available here.