You can also consider buying a tradeline which will give you all the benefits of having a co-signer without anyone taking on the liability of your credit. When you buy a tradeline, that line of credit is added to your credit report, for example if you buy a tradeline that has a $20,000 credit limit, 2% credit utilization and 10 years of credit history that helps out your credit significatly giving you a better change to buy a new car.