BuyDig offers the WD Sentinel DS5100 4TB Ultra-Compact Storage Plus Server
, model no. WDBYVE0040KBK-NESN, for $899
with free shipping
. That's $351 under our June mention and the lowest total price we've seen. (It's a current low by $1,661.) It features an Intel Xeon dual-core processor, 8GB RAM, LCD status display, Gigabit Ethernet, and USB 3.0.