I have a 1990 Acura Integra with 194,000 miles that is on it's last legs. I wouldn't be able to sell it, nor would I be able to sell it to someone in good faith. There are charities that will take the car and then allow you to write it off on your taxes as a charitable deduction. What I want to know is, what is the process like and how much can you deduct? Will the charity use some sort of blue book value for the deduction, or basically let you determine how much the car is worth?