I bought one from tractor supply new for about $100. I actually have a buddy stand on it and hold on to the back bike rack. It works really good with his weight shifting around. I tried blocks and steel plates, but found having a friend stand on it worked best for me. Of course this guy is 240lbs. I personally already owned an ATV and could not afford to buy a used tractor. It works good for me. Obviously using a farm implement would be easier, but I don' t have the contacts to borrow one or the money to buy one. If you plan on using it for a garden you might be better off buying a walk behind tiller. I would not want to put in a small garden with my setup. It would be too hard to maneuver around a tight yard.
Try this link to tractor supply.
http://www.tractorsupply.com/detail....productID=2649
Rooter