I have a chance to buy a 1985 Mariner 5 HP outboard.It's a one owner motor just completely serviced about a year ago,lower unit seals,new water pump,new spark plug,carb cleaned ,etc. .It comes with the owner's manual,original tool kit ,3 1/2 gal.remote tank,lower unit oil,and oil for the fuel.Asking price is $350,is that a fair price ?