TigerDirect offers the Seagate 4TB Serial ATA 6Gb/s Internal Hard Drive for NAS, model no. ST4000VN000, for $179.97. Coupon code "UOT120169" cuts it to $149.97. With free shipping, that's $5 under our mention from December and the lowest total price we've seen. (It's also a current low by $20.) It features a 64MB cache, NAS error recovery control, improved vibration tolerance, and advanced power management. Coupon expires March 21.