We have a number of 44 Toro WB that have seen there better days. Don't get me wrong - they don't miss a beat yet and still cut 8 hours a day 5 days a week. I also am running 4 Z master 52 toro, all are 3yrs old, 750 - 1500 hours / machine. I also have a Toro 220D, 2000 hours, but it looks good, runs great and cuts great, do I keep it, trade it, or just sit on it until it dies. Time to trade, keep nickel and dimeing them or what. What do you guys do on equipment and how long do you keep it, trade it, determine / hour what? Thanks.