in our steep hills we have worked with tracked tractors for several generations. Farms used to overhaul steel track tractors that grandfathers bought and keep them in service on the farm. Moving into the Challengers, the E series is also a highly sought after workhorse that had most of the bugs worked out by then and they don't come up for sale very often around here anymore. Once they find a home on a farm they pretty much are going to live the rest of their lives there.