Used lathes
Yup, Tiriaq is correct when he said that a USA, Japan, German, Swiss. . .
made machine (if in good condition) is definitaly better quality.
Unless you are able to start the machine up to "listen & feel", a visual is all
you've got go go on.
I been around hundreds of machines in my time and for the most part,
a detailed 5 min. visual will give me a 90% correct indication of how
that particular machine is going to perform.
Check the main things like, (for a lathe) the bed and cross-slide ways.
How clean, unworn and unmarked are they?
How 'Smooth' do they glide? and I mean smooth!
when I bought machines for my business I was picky, but then again,
machining is my money maker, gunsmithing isn't.
Take your time, you'll be glad you did.
There are alot of "looks good from far, but far from good" 's out there.
My 2 cents, hope it helped.
....WW