I purchase a 1992 lexis for $1400. I only gave the man $700 do to him not having the title in hand but he promised it's in the mail and will arrive tomorrow. So now a year has gone and past still no title and the man is back and demanding me to pay him the other $700 and he still don't have the title and is now threatening me and claims he's going to come take the car. What's the best option for me in this situation? Please advise me. I also have a bill sale sign from the man states Im the new owner of the vehicle