Synology via Amazon offers the factory-refurbished Synology 4-Bay All-in-One Gigabit NAS Server, model no. DS412+, for $299.99 plus $16.34 for shipping. That's $164 under the best deal we could find for a used one (this one's a refurb). 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. A 180-day Synology warranty applies.