I have an antique Evinrude outboard in good condition that I wish to sell and am not sure how to set a value. It is in good cosmetic condition, it has been stored inside for at least 30 years, but I've not started it up for at least 15 years. What are the issues I need to address to sell it? Should I restore it more, sell it as is, are there specific things to look for? I appreciate your help. Model #4307; 3hp, manufactured in 1939 according to the Evinrude site.