The best way I've found through the years to buy a one owner vehicle from a family member or whatever is to walk up with the total cash of my offer in my front pocket. Haggle a bit after the test drive. Give them final offer AND pull out the roll and flash the crisp hundred dollar bills. And if they don't immediately bite you say good bye and turn around and walk down the driveway. Bring $8500 in your front pocket. Offer him that. And flash the bills. And then walk away. See if he reconsiders.....