What can you guys tell me or advise me about a 1988 Sylvan 18' aluminum walk through? It has a 130 hp Mercruiser 4 cylinder inboard/outboard. Ad says it runs perfect and will go 40 miles per hour. Also says the boat is in very good condition. I would be using it mostly for fishing on small fresh water lakes in the Sierra Nevada mountains. My tow vehicle is a 2008 Ford Escape which is rated to tow 3500#. How much do you think this boat would weigh? He is asking $3800.00. Any help you can give me would be great!