When sourcing a used boom lift, the primary focus must be on structural integrity and hydraulic performance. Buyers should request a comprehensive inspection report covering the boom sections for cracks or welds, and the hydraulic cylinders for leaks. It is critical to verify the hour meter reading against the machine's overall wear; typically, a well-maintained unit should have fewer than 5,000 to 7,000 hours for a second-life cycle. Ensure the Annual Inspection (ANSI/SIA in the US or CE in Europe) is up to date and that all safety sensors, tilt alarms, and emergency lowering systems are fully functional.