Home › Blog › Buying Guide › What Do Buyers Look for Before Investing in a Pre-Owned, Used, Secondhand, Surplus CNC Equipment Before Purchase WHITNEY 3400XP CNC Punch & Plasma Plate Fabricator Combination Machine made in USA When you’re evaluating a used (pre-owned, surplus, secondhand) Whitney 3400XP CNC Punch & Plasma Combination Machine (a hybrid “punch + plasma” plate fabricator) for purchase, you must combine the inspection criteria for CNC machines plus those relevant to plasma cutting, punching / turret machines, material handling, and environmental systems (dust, slag, thermal, etc.)....