This will be our first boat. There is a 1987 Catalina 36 foot sailboat. It's in good condition. It's been upgraded with an in-boom mainsail furler. It's for sailing on Lake Michigan. We are considering placing an offer but are looking for guidance on what the market value might be for a similar boat. We know it will depend on a survey, but are looking for some rough ideas of the price point on this year of boat. Any guidance?