Before buying, check: spindle hours and condition (listen and feel for the spindle), way and ballscrew wear (backlash, way-cover condition), control generation and installed options, included tooling, and a running-under-power demo cutting a test part if possible. Confirm accuracy and repeatability, and get the maintenance history.
Then sanity-check the asking price against the real market. Pull a free value for the exact make and model at The Machine Blue Book before you commit.
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