This trailer has been listed for months on austin craigslist. I checked it out a few weeks ago.
This person simply screwed down OSB on top of the failed floor. The parts you'd want to pattern are long gone. There's a vertical crease in the back roadside corner. The axle has completely failed. It needs new tires before towing. The rear frame has rotted where it goes under the body.
It is not possible to do an effective restoration with this AS - though it might be suitable for refurbishment with an all-new interior, if you're willing to go the full monty...
I wasn't interested at $2,500. $1,500 is better, but I think, with the lack of any title on top of its other very serious problems, $800-$1,000 is more realistic.