Great suggestion, bobconnie... you need someone who is working for you, is competent, licensed and gives you an unvarnished opinion. It is worth exactly what you pay for it. Additionally, if at all possible, go through the boat yourself thoroughly before your surveyor
and let him or her know what you have found. Ideally, you should accompany them on the survey
because as they turn up things, you are right there to discuss them as to how serious they are and how fixable.
If the boat is in a different location that is difficult to get to, they are your eyes, ears and nose. It truly is money
Concerning the OP question, I would certainly ask the broker for full disclosure of his knowledge of the boats' history
and if you are concerned, an affidavit from the owner is quite appropriate. Something to share with your surveyor
... Cheers, Capt Phil