Those videos where the new owner discovers the frame looks like it has been sitting in the ocean for 80 years have to be fake. There is no way someone wouldn't notice that. Not to mention if the frame is that corroded the myriad of things that probaby don't work, electrical shorts, idiot lights on, doors that don't close right, etc.
Come on, you're buying a car/truck whatever in the snow belt states. Crawl under it and take a look! Any state for that matter. Salt water and air do the same thing.
No inspections in Florida, run what you brung is the rule here.