Originally Posted by snowpig32
Lumatic; You spoke of rear end sag / separation.
You can get a hint by looking at the caulking where the body meets the bumper. If there is no long horizontal cracks it's a good thing. The bumper bounce is the acid test. Make sure the rear stabilizer jacks are up.
I can't definitively tell about the axles from the photos. What is clear is they are not showing they are OK. Can't tell they are not either though. The fact that the owner did not have a photo of the arms suggests he doesn't know about axles, or does and is trying to hide something. From the axle there is a arm that comes off at an angle and attaches the wheel. Ideally that arm should have a downward angle. In the photos it looks like it is probably horizontal which may be OK or may be the axle is on the way south. Crawl under and take a peek. An upward angle is a bad thing. Another test is to jack up one side of the trailer. The wheel should stay in contact with the ground for at least 2" but 3" is more better. If it doesn't the rubber in the axles has hardened. Not a good thing.
What the photos do show is a lot of rust. The concern here would be frame weakness or damage. About the best you can do to check is a flashlight and mirror in the rear compartment, under the sink, and if there are any access areas in the belly pan. Find out what you can about the trailer's history and how it was stored. High humidity, road salt and sea salt air are killers.