MonoPrice offers this RAID 2-Bay 3.5" Serial ATA / USB 3.0 External Hard Drive Enclosure for $52.50. With about $8 for shipping, that's the lowest total price we could find by $19 and the best non-rebate price we've seen for a USB 3.0 RAID hard drive enclosure. This 3.5" SATA hard drive enclosure features up to 5Gbps transfer speeds and an aluminum cover. It holds as many as two drives with up to 2TB capacity each.