I found the NADA guides lows for certain boats. A boat is almost really like an antique car - we have a 1927 REO Flying Cloud Coupe. Value is truly is what someone is willing to pay for it. Engines, hours, and condition contribute, but a cig is a cig. I put almost 15 grand into my boat (NOT a cig) and the NADA still call it at 29 and I would never let it go for that.