Byers -- sounds like a headache
You must know some reputable dealers in your area, price their used stuff.. If buying from an individual go to a dealer that handles that equipment and ask him to look up the retail price for that piece of used equipment.. Dealer might not be able to sell you a mower but at least he will profit from the repairs that you will be needing. My advice - walk away from this (quickly).
Robert's Lawn Service