You would be the SELLER not the BUYER. The buyer has no idea if what you tell him is true. I have bought several cars for parts and for restoration. The ones I bought and the ones I just looked at had 1 thing in common. The sellers all said "It was running just fine when we parked it" Granted some people take better care and their high mileage cars are better than low mileage cars some teenager beat the heck out of. BUT there is no way to tell which is which the only concrete measure is mileage and year. Even this can be faked.