Hello - welcome to the forums.
For raw aluminum value it all depends on your salvage technique and your buyer.
A salvage yard may offer 90-cents a pound for can aluminum but that is actually an aerospace grade alloy, if you can separate your old trailer into bits and pieces the outer shell alloy may fetch 65-cents if you have stripped all the caulk off the pieces, inner shell alloy with paint on it may get 50-cents, the castings a little more, etc. etc. Calculate 30 to 50% aluminum by weight - steel frame, axles, wheels, glass and interior wood and appliances take up a huge percentage of total trailer weight.
OR by carefully removing the exterior corner sections that are nearly perfect, windows, door & frame and locker access panels, removing trim, pulling interior and setting the good pieces aside, pulling perfect shell ribs and floor channel in shippable chunks, pulling the name plates and steps, plumbing and fresh air vent caps and all reusable discrete appliances *then* hold a perpetual eBay 'Best Offer' sale for the parts shippable AND local pick-up only blah blah blah.. in a few months you may have sold most of it.
Or... do nothing but put in this forums' classifieds with an inspection by a knowledgeable forum member who happened to be traveling through Idaho anyway would be the most desirable.