Tips on Buying Cars: upside down, carmax, electrical problems

Question
I bought a used Deville last year from a local dealership at the time it was still under warranty. After the warranty ran out the car started having electrical problems one after the other. I can't afford to keep putting money into this car. I still owe 20+ on it and it may be worth 14. What can I do to get out from under this car, buying another car isnt that important I just want out of this one with me credit still intact.  

Answer
Try advertising your car in the paper or, if there is a CARMAX franchise in your area let them bid on your car.  CARMAX will buy your car for the same price whether or not you buy one   from them.  Other than that you might have to pay the difference.  Sorry the news is not better.