What I did, because I could not find a cheap used grinder, was just to go to vermeer and price out the individual parts and put it together. Tires, hubs, axles, sprockets +chain, and hydraulic drive motor and everything else was $1500 bucks out the door. I already had the small morbark sitting around for like the last 5 years and it needed a new motor so I ordered a new Vanguard 35 horse for another 2 grand. Originally the chipper ran off a 25 horse and was surprisingly a pretty gutsy for its size. More along the lines of the Bandit 6 inch as it has a nice wide 11.5 inch throat