What is a reasonable Finance Charge to pay for a vehicle that is priced at $13k?

I am looking to purchase a 2006 Jeep Cherokee, but I want to get a good estimate that is realistic and reasonable for the finance charges etc that I will be charged when I go to sign for the vehicle. I have already been through the motions for it once and they wanted to start me off at $379/month payments for 5 years. That totals to almost the same amount as the vehicle in finance charges alone. Even though this is my first car bought at a dealership what is an expected/reasonable finance charge to settle for?