UNLESS you're passionate about the car I would recommend selling it. Old cars deteriorate rapidly if not well looked after, and that means regularly driving them, regularly changing the oil and so on. If you're not an old-car enthusiast it's best to sell it to someone who is. Your Benz, though it would no doubt be attractive to a Mercedes enthusiast, will increase in value to any great extent. The cost of keeping it is likely to exceed any increase in value that may occur. I think you'd get $6000-$7000 for it depending on its condition. There are two ways of selling it: advertise it in the specialist press, or try contacting a Mercedes-Benz club.