How does one go about determining the value of a boat in today's market. My Formula is an uncommon boat and I had it valued a few years ago. What sort of percentage creep has there been? Should I increase it's valuation for insurance purposes? When I do a universal search on the used boat market for what I have insured it for I get 20 year old boats in the 26-28 foot range and tired 40 year old boats in the 40 foot range and nothing in the sports cruiser 34 foot range. When I look at similar more familiar boats like the Sealine S34 and Sunseekers of that era my boat belongs I'm getting results of boats that appear to be as much as 20% over what I would have expected them to go for. Is that how much the prices have crept up?