What i normally do is look at the price now say 2002 and the cheapest and the dearest, see what spec's, does yours have anything extra, is the colour popular,condition of the car, all MB service History,Mileage how many owners and so on, if you think yours is the best ,add about a thousand pound or nearest offers, , its what people want at that giving time, you could put it on a week later and get many more calls then the first week and sell it, i use the auto-trader for guide lines, i always buy a convertible within the 4 months of the year cheaper then say summer , they go up from anything £500 and £1k+ when its sunny..my car has the basic engine 200k but i have never seen one with my interior yet, so to me mine is different and special in my eyes,, nobody can give you realistic a price, dealers want to make a profit so will tell you less, a private buyer is the best as you can explain to buyer all about your cherished car, a dealer is not interested in your cars life as he isnt keeping your car, my car was bought from a dealer , but the guy who own it (before me)was there looking for another car , he didnt buy one,but gave me the run down on my car, i felt better and bought the car.......so the eaiser the answer is try and sell ask what you want and add a ono (or nearest offer).. there will many idea's, but at the end of the day ,you are the only person who will sell or you maybe never happy............