Commercial CNC machine lifespan?

[GEOFFREY]

Whilst the manufacturer will probably be quite helpful, they would also like to build up a relationship with you in the hope of selling you an upgrade or even a new machine. After the first user, it is likely that the 2nd or any subsequent user has not used the manufacturer for routine servicing, but that does not mean that the machine has not been regularly maintained. As a general rule I think that the condition and price will be your best guide - if a machine is really cheap, be aware that you may have to spend some money on it. I bought an older "scruffy" cnc router (spares or repair) and it is now back in everyday use and doing a good job. A new machine would have been far nicer, but a. funds were not available and b. the work would never have justified the expense.
As you intend to do mainly 3d work, the newer machines are likely to be far more suitable due to much improved software and modern electronics. G.