Newegg offers the Synology DS412+ 4-Bay All-in-One Gigabit NAS Server for $586.40. Coupon code "AFSUMRLNG3" cuts it to $527.76. With free shipping, that's $12 below last week's mention and the lowest total price we've seen. (It's a current low by $47.) It features a 2.13GHz dual-core processor, dual Gigabit Ethernet ports with failover and link aggregation support, USB 3.0, and eSATA. No hard drives are included.