I recently sold my car privately. Upon the selling of the car, I informed the buyer that there was a problen with the engine and that i was selling as is. The buyer is now trying to force me to take the vehicle back. Also trying to force me to pay the towing bill to remove the vehicle from my driveway at the time of sell and the bill where he had the car diagnosed for required maitenance. Am I lagally responsible for refunding the money of the purchase and\or the towing and maitenance bill?