There was a guy in some forum / may be Practical machinist/ that explained very well when deciding on a machine and its price.

Simply said you should really need it. Then a good machine will have 10 years x 24h non stop life. So even if not the case here, price has to be divided on 520 weeks so you see what it will cost you per week to own it/ or day or month, etc../ Then Calculate how much will cost you any downtime, missed job, etc. Then see whats the week cost of ownership of a crappy machine and a good machine and how down time goes into that calculation...

So that said, the Chinese machines for me always would be an unknown with a potential of a disaster. Remember the " large router thread" i started where it turned that the large Chinese routers have a crap bed?

Old brand machines if in not working state should be very cheap, or if in working, that state must be demonstrated. or you will find how much a brand company charges for a mother board, computer or similar. But mechanically my bet will be on a brand machine. Later in worse case scenario retrofit with Chinese offline controller 600-1500 euro.