Can I Sue My Marine Surveyor for a Low Appraisal?

I am in a dispute with a marine surveyor over a survey that he performed on my boat. I bought a boat that was a bank repossession. We got a really good deal, and similar boats were being sold at the time for more than twice the purchase price of our boat. I know that this boat, as a bank repo, was not in perfect condition, but I also know that we got a great deal on it. My problem with the surveyor started when I saw the market value that he put in his survey report. He listed the appraisal at the selling price instead of the real market value for the boat. As a consequence of the appraisal, we were unable to insure the boat for what it was truly worth. We tried to work with the surveyor to come to a compromise on the value, but he insisted that the most accurate factor for determining market value was the purchase price. With this in mind, we have two questions. First, is there a specific policy for how to appraise repossessed boats? And second, should I pursue a civil case against this surveyor for the effect that...