Originally Posted by Paul O.
I would take a very close look at the frame in that area. Not just ask. Where the parallel tubes (front to back) are bent to make the "A" toward the hitch is the area that is vulnerable.
Paul raises a good point - Looking at the picture it may not just be a rotten floor issue.
Common failure point of the frame on the Scamps is where the frame starts to go under the trailer (two frame channels welded together at that point). Also a a few feet further under the trailer where the frame takes a bends is a common point for frame failure.
If you do not already have pictures of the underside of the trailer showing the state of the frame you may want to ask for them. Then again it looks like you will need to remove the shell from the frame anyways to replace the floor and do the needed fiberglass work and repaint the trailer after fiberglass work is done, so repairing or replacing the frame may not be a big issue. Just more $$$$'s.