Before I go further,
here is some information aboud an ODroid-HC4 with a based price of US $65. I wonder if anyone out here contemplates to get one to try. When I 1st saw this, I thought it just looks similar to a Seagate FoGLEX/NET unit. A further read on its specs really blows my mind away, with an exception it does NOT come with a USB3 port (if there exists such a SATA-2-USB3 port, I certainly wouldn't mind). Anyway, the version with a 4 GB RAM can certainly be turned into a Linux Desktop computer with a NAS, too.
Ameridroid is accepting a pre-order for the 4 GB RAM version US $71.95 / each, if anyone is interested.