Home › Blog › Buying Guide › What Do Buyers Look for Before Investing in a Pre-Owned, Used, Secondhand, Surplus CNC Equipment Before Purchase STAMA MC533 TWIN Spindles CNC Vertical Machining Center made in Germany Below is a detailed checklist and guidance on what to look for specifically when evaluating a pre-owned / surplus CNC (vertical machining) center — with notes tuned to a twin-spindle / dual-head type machine such as a STAMA MC533 (or similar) made in Germany....