In the past I did home inspections. On occasion I was asked to look at homes for out of state clients. I ran into the same thing, someone wanted a contract
before an "Inspector" went in. From that point on I went in as a friend or a perspective buyer if the owner was real anel. Took lots of pictures, noted a few things and wrote a short right-up of the general visible condition with lots of clear language that I didn't "inspect" anything to the buyer. Normally only took about an hour and the buyer was happy. Can't see why the same couldn't be done on a boat. If it was a real good deal and everything looked good from the photos on line from the brokers add I'd want a contract
on the boat that gave me some easy outs if I decided not to purchase
it. Such as "contingent on Buyers review", "contingent on Financing", and the biggy "contingent on Inspection". I wouldn't want to buy a ticket to go see it and then have someone put a contract on the boat before I got there. Don't let a Contract issue keep you from purchasing
something you want.
Steve in Solomons MD