Actually the wen mac wasn't a bad motor at all. Can you believe that it was designed by Bill Atwood the same man who designed the Cox TD series. At any rate it was made origionally by A.M.F. same company that made bowling equipment and it really wasn't a bad running motor. The trick was that you needed a really hot plug and a good fresh battery to get it going. In those days we all used alkaline batteries and they dropped off just enough to make starting that motor miserable. It runs best with 5-4 props and will turn decent rpm with cox 20% in it. and yes a wen mac in good condition might get $5/$10 on Ebay