Here's one data point that you might consider.
I bought a yr 2000 Enco 9x42 mill for $4000 10 years ago off a West Coast Craigs List. That is a premium price, but I bought it from a local machine shop owner, who had bought it for his (late) father and he let me see it first. It's a two speed 220v 3 phase stepless pulley model and has a 3-axis DRO. He included a set of 5C collets and a 6-inch import vise. The machine was made in the Mainland.
If I were you, I would definitely see the machine first and perhaps even make him power it up to make sure it's worth your trouble. As has been said, it's 220v, plus could be three phase. It weighs over 2K lbs so will not be without effort to move it and set it up in your shop. If you have experience with these types machines or know someone who is, that's one thing. But if you don't and there any problems with the machine, you could be SOL.
I have had no problems whatsoever with my Enco. I did replace the DRO that came with the machine with a more advanced, later model DRO and replaced the spindle return spring with a new one. As someone already said, MSC has parts available for these machines.
Here's the Craigs List photo of my machine. FWIW, I just looked up the price in a 2012 Enco catalogue for a 9X42 step pulley Enco mill with DRO - $7600. Also, there are several Encos on Ebay now for $2500 - $4000 (OBO) plus shipping.