Used Tractors for Sale Across the USA Finding the Right Used Tractor When comparing used tractors for sale USA, begin with the jobs, acreage, and terrain the tractor will handle. Horsepower alone does not tell the whole story: traction, weight, hydraulics, and implement compatibility also matter. Explore available equipment through certified pre-owned tractor while evaluating your options. Matching Horsepower to the Job Choose engine output according to the heaviest regular task rather than ...