Well thanks for the info, but i reckon most would be put off buying a 2nd hand cnc router given its probably been worked to death and you could end up with a host of problems.
The ones you mentioned. £1500 2nd hand - possibly fubar I mean unless you are experienced in this and few to no new users are, you just dont know the state of things unpacking from the box. The others Denford for example. Whats that £5-7K 2nd hand ?
So we've gone from £699 to £6999
I respect your experience in this. But you cannot compare a hobby machine against an expensive professional or industrial system.