Aluminum boats are not aluminum cans, and the price is a lot lower.
It is called Aluminum Breakage Scrap
Current US prices are between 2 cents and 19 cents per pound, with the average price being paid last week being 7 cents per pound.
So a 400 pound boat with most of the other materials removed will get you $28.
A steel trailer will get you about the same as the steel price is in the toilet.
Never had to cut up any scrap we hauled in, not even 20' sections of radio tower.
If it would be repairable or useable at all, it would be better to sell it or give it to someone that could use it in a private pond.