How much is 1980 Honda Moped Express worth running and ready to ride?

I have 1980 Honda Express Moped and trying to find a value on it. It runs good I have had it for 3 years and it runs good. I have had many offers onit but don't know what to sell it for.|||Old mopeds in proven running shape go for about $100.00 to $300.00 around here in Madison, Wisconsin-- there is a large college campus with tight parking for cars but allows mopeds to park in most of the bicycle areas so that has somewhat helped maintain market price. Honda dealers network also helps keep price up a bit. If you don't have a extra niche market like the college campus- maybe only $200.00 tops, people worry about mileage and top end overhauls or drive train failure, tires, etc. Helps that it is running- mileage AND TIRE CONDITION WILL BE DICKERING POINTS.