I am selling my car and accepted an offer from a private party wishing to purchase it. The person needed to get financing for it the next day. I gave a piece of paper stating only "I Brent XXXX agree to sell (car) for $price," with my name/address. The buyer gave no money to hold the car. In the mean time I determined I was unable to sell the car (for personal reasons), and called the purchaser early the next morning to explain. Now they are threatening legal action. This piece of paper was not dated, nor signed by the buyer, nor was the buyer's name on the paper, there was no "date of action" or delivery date printed. What am I up against if they pursue legal action?