A clean listing photo is not an inspection. Bring a checklist, a magnet or probe for soft metal, and daylight you can actually see under.
Match the VIN on the title and the frame. Ask about liens, accident history, flood exposure and service records. For trailers, confirm that axle plates and GVWR stickers are present and legible — missing plates are a negotiation point and sometimes a walk-away.
If the seller cannot explain ownership clearly, pause. Transfer problems outlast any “great deal” price cut.
Probe frame rails, crossmembers and floor. Soft spots under carpet, rubber mats or wood decking are red flags. Look at weld quality on repairs — neat paint can hide ugly fabrication.
Check coupler mounting bolts and tongue for cracks or bent steel.
Test brakes, listen for hub noise, measure tire age by DOT date. Dry-rotted sidewalls fail at highway speed. On trucks, scan for stored codes if possible and review transmission service intervals for tow use.
Plug in and walk every light. Operate electric brakes with a controller; inspect magnets and shoes if the seller allows. Confirm breakaway switch function.
Re-run the matching math from our trailers guide with this unit’s real empty weight and your typical cargo — not the optimistic number in the ad.
Questions about content on this site? Contact. Review safety before the first loaded trip.