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Hi, Allen. Why is a hen? How is a policeman? How long is a piece of string? Your question is pretty much un-answerable because of so many variables. Some people will have a set number of hours that they trade them in at. Others will just keep repairing and repairing. Then there's the work it has been put into, whether hard or easy, the maintenance it has had --- or hasn't had, and whether or not it was serviced regularly and thoroughly --- or not. Some would say, if it works, it ain't worn out, if it don't, work fix it. Others want to trade them in when the first paint scratch appears. I've known people who would never put new tires on a car. When the tires were worn out it, was time to trade the car. Does that make the car worn out? It's all a matter of perception -- of how much time - and money - you are willing to spend keeping the whatever going as opposed to the amount of work you have for it, or for a new one. You have a wonderful day. Best wishes. Deas Plant.
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