When sourcing a used skid loader, you must prioritize the Rated Operating Capacity (ROC) to ensure it meets your lifting needs, typically ranging from 500 lbs to over 3,000 lbs. Closely inspect the engine hours; a well-maintained machine usually has a service life of 5,000 to 8,000 hours. Additionally, verify the hydraulic flow rate (Standard vs. High Flow) to ensure compatibility with attachments like augers or cold planers. Check for leaks in the hydraulic cylinders and the condition of the undercarriage or tires, as these are high-wear components that significantly impact maintenance costs.