If you do donate your car, be sure to save the receipt and do what you can to get the title out of your name or show your state's DMV that the car is no longer yours--this varies between states. I have heard of more than one case of someone getting a visit from the police for a donated car that the charity sold, but the buyer didn't do his paperwork so the license plate trace after an accident or criminal activity led back to the donor.

Having said that, there is a charity that advertises on Portland, OR TV for donating vehicles.

Some charities will fix up low-maintenance vehicles and give them to families that need basic transportation to job search and commute to work. But if the vehicle is a high-maintenance vehicle or still a reasonably expensive vehicle, they will auction it off and use the cash or sell it to a salvager. In any case, it is very likely that if a vehicle is donated to a charity, it will end up in the hands of someone who isn't a representative of that charity. That is why it is important to cross every t and dot every i that you can.