B&H Photo offers the Western Digital My Book Live Duo 8TB NAS, model no. WDBVHT0080JCH-NESN for $349 with free shipping. That's $100 less than our mention a year ago and the lowest price we could find by $31. It features two 4TB hard drives, an 800MHz processor, RAID 1 mirroring, and USB 2.0 and Ethernet ports.