CineRAID CR-H458 RAID 4-Bay 3.5" USB 3.0 & eSATA Enclosure for $179.99 shipped.  Here is a screenshot for your reference.  It is hot-swappable and features USB 3.0 and eSATA connectivity, RAID 0, 1, 10, 3, and RAID 5.  It also has a toolless design, internal RAID controller, automatic RAID 5 rebuild mode, and more.