When sourcing used campers, the most critical technical aspect is the structural integrity of the chassis and body. You must verify the absence of water damage or delamination, as these are costly to repair. Inspect the seals, roof membranes, and slide-out mechanisms for wear. Additionally, ensure all on-board systems (LPG, electrical, and plumbing) are functional and have undergone a recent safety pressure test. For motorized campers, a certified engine and transmission diagnostic report is mandatory to ensure mechanical reliability.