In the UK ebay motors is good. If the car is genuinely good condition and you clean it up and show it off with plenty of pictures and it is a desirable model that has as following, then people will bid it up to more than you could get through the classified ads and that will cover the ebay cut.
Alternatively car magazines where your local traders advertise are good if a basic advert is less than 40 dollars. General advertising is rubbish. You need to attract people who are looking for cars, not tyre kicking idiots.
That they have spent a couple of dollars on a car magazine is good sign.
I sold used cars from home for nearly 20 years, as a hobby, and was very good at it.