I will be buying a used walker from my former boss soon. It has approx 14,000 hours on it. I have used it many times in the past and it is still a good machine despite the amount of hours on it. Do you guys think that about 1000- 1200 $ is a fair price for this machine? Also i will be cutting 20- 25 lawns a week with it, do you think it will hold up?