Home › Blog › Buying Guide › From Factory Floor to Your Workshop: Evaluating a Pre-Owned, Used, Secondhand, Surplus CNC Machine Before Purchase Zayer KF 4000 CNC Bed Type Milling made in Spain If you’re evaluating a used machine like the Zayer KF 4000 (bed-type CNC milling machine made in Spain) for purchase, here’s a detailed checklist and guidance — from factory floor to your workshop — tailored to what to look out for, what to verify, and what questions to ask....