mwave offers the Sans Digital MobileSTOR 4-Bay FireWire 800 / FireWire 400 / eSATA / USB 3.0 Hard Drive Enclosure in Silver, model no. MS4CT+, for $169.99 with free shipping. That's the lowest total price we could find by $28. It features four drive bays that can each handle up to a 3TB 3.5" SATA hard drive (12TB total), LCD display, RAID 0, 1, 1+0, 3, and 5 configurations, and more.
Sans Digital MobileSTOR MS4CT+ 4 Bay USB 3.0 eSATA 1394a 1394b Hardware RAID Enclosure FireWire (IEEE 1394a), USB, USB 2.0, FireWire (IEEE 1394b), eSATA Drive Case is also available at these stores