Small CNC Drill/Mill

Good Day All.

After seeing the post by windows20 "now the trouble starts" and seeing the two smallish units he picked up for around £100 each.

Has started me thinking, how often do these kind of units turn up, and are there any web sites that sell used units.

From what I have read on the internet is most of these units are not plug in and go as they have to use there software, interface cards, ect

So I am looking for a unit with all the axis, and stepper motors, but does not need the control boards, ect, as I would be replacing them.

The unit only needs to be able to drill mill, pcb's, mdf, and acrylic.
What can you recommend?

Thanks for your time.

Best Regards.