A friend of mine has I think a Johnson 10 hp 1956 with remote tank new in the box don't think the motor has ever been run other than at the factory . he plans to start using it next summer I can't talk him out of it ,he has origional sales receipt, I think a dealer gave him the red a$$ ,about a trade, I would just like to have it in the family room. any idea what I should offer him ?