Mini PC Kit?

Hi everyone

I want to know if you can buy a kit to build a mini pc about the size of a Gigabyte Brix or so, relatively on the cheap. If possible would there be one that you can solder in the parts such as resistors, chips etc (fully assemble the MoBo and stuff). I just thought it would be cool for a little project, I have no idea if this exists or if they make stuff like this. Thanks

Doubt it.  Closest thing would probably be something in a Thin-ITX form factor.