Western Digital offers its Western Digital My Book Live Duo 6TB NAS, model no. WDBVHT0060JCH-NESN, for $499.99. Activate this link and it falls to $399.99, With free shipping, that’s $0.07/GB, $70 under our mention from three weeks ago (which included a router) and the lowest total price we could find by $40. It features two 3TB hard drives, 800MHz processor, RAID 1 mirroring, SATA interface, and more.