What would cause this (picture of the damage)

I would use it to talk the price down considerably then get it fixed. You could end up with a perfectly good trailer for cheap.

 

a corner and draggin over boulders comes to mind.. I'd say it was a tire eater too.. will stay in alignment ?

 

Probably a sliding mishap. I have picked up two trailers with the spring loaded pins,that drivers pulled so hard,the slide rail was sitting on top of front pins.

 

Happens all the time, the clamp gets bent from hard turns which spread the rails. Doesn't do anything with the alignment, pins do that. We always replace all 4 at the same time.

 

sliding tandems with airbags not fully inflated and at an angle,( turning).

had it happen last summer.

trailer worked fine after shop got back on track and that was a chore.

 

The Nut holding the seat to the wheel!

 

Looks clean underneath otherwise, better than a lot I have seen. I would use it as a bargaining tool and then have it fixed.

 

No big chore, impact and take two bolts out. Rail drops back on the box. New clamp(we pay about 20.00) tighten two bolts and done. Takes more time to drag air and tools than to do it. Doesn't do anything to the alignment, only purpose is to keep the box to the rails.