MacMall offers the factory-refurbished LaCie 10TB 5big Thunderbolt Series 5-Bay RAID Enclosure, model no. 9000378U, for $619.99 with free shipping. That's $313 under the lowest total price we could find for a new unit. It features five hot-swappable drive bays with RAID 0, 1, and JBOD support, transfer speeds up to 785MB/s, and dual Thunderbolt ports with daisy chain capability. A 3-year LaCie warranty is included.