Over the past few years we've reviewed a handful of NAS (Network Attached Storage) products and while most of them have been very impressive, they all shared one common pitfall: they were extremely pricey. So expensive in fact, that they're little more than a pipe dream for the average user.For example, about two years ago we reviewed the powerful Synology Disk Station DS-409+ which cost a cool $600 without any hard drives installed. Later on, the QNAP TS-809 Pro surfaced on our radar with a starting price of $1,700, which is considerably more than most spend on their primary PC.More recently we checked out the Synology Disk Station DS410j, which is a value oriented 4-bay NAS device, but it was still $370 and we estimated at the time that adding four 1TB hard drives could balloon the total cost to $700.