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:

• 2TB for $479.99 (was $520)
• 4TB for $549.99 (was $650)
• 6TB for $679.99 (was $780)
• see all Mercury Elite-AL Pro Qx2 FW800/USB2/eSATA Hard Drives at Other World Computing