Home › Blog › Buying Guide › How to Avoid Common Pitfalls When Buying a Pre-Owned, Second-Hand, Surplus, Used Doosan DNM 5700S CNC Vertical Machining Center made in South Korea When you’re considering buying a used / surplus / secondhand Doosan DNM 5700S (or equivalent DNM 5700 variant) CNC vertical machining center, there are common pitfalls that even seasoned buyers stumble into....