Have you ever wanted to buy or sell a vintage trailer and then thought about how you would ship the trailer? The team at ConsumerAffairs created an article on the cost of shipping a car. Much of what applies to shipping a car applies to shipping a vintage trailer.
They have a section on vintage cars and just substitute vintage trailers but of course trailers introduce an additional challenge of the length involved.
The article can be accessed here: How much does it cost to ship a car?