Guaranteed car finance for used car loans can be obtained through car dealerships willing to work with any buyer, regardless of his credit. Many companies advertise through car dealership commercials. They emphasize to the viewers at home that there's a car with their name on it, regardless of their financial standing. These ads attract the person sitting at home trying to figure out how he is going to purchase another vehicle with his past history. If car buyers have a job that allows for the monthly payments on the car, most dealerships will find a way for them to buy a vehicle.