Other World Computing offers its OWC Mercury Elite-AL Pro Qx2 FireWire 800/USB 2.0/eSATA Drives with prices starting at $479.99. With free shipping, each is at the lowest total price we could find. Each drive holds up to four 3.5″ SATA 3Gbps hard drives and supports RAID 0, 1, 5, 10, and NRAID (Span). Some best bets:

If you have your own hard drives, the Mercury Elite-AL Pro Qx2 Quad Interface RAID Enclosure is available for $299.99 plus free shipping.

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