I do start them first with a random starter first to see if they are good enough to continue with.And I wouldnt sell anything that I wouldnt own myself which is why under the house is full of junkers.I dont see how the age makes any differance if it is a solid engine.There is very little in the way of profit in the mowers I sell I do it more as a time filler and have'nt had an unhappy customer yet.From what I have seen your average person just wants a mower that they can go out to the shed on a sunday grab the mower that starts without a sweat then get back to cutting up the onions.