I helped my mom sell her old car by using cars.com ...
She got more than she thought she would for it. She also got lots of people calling asking questions, wanting to see the car, etc.
I forget the exact amound she got , but it was a 1995 ugly green Ford escort ugly hatchback with a Cracked windshield, it had been in a bad accident several years before (car was rear ended at a red light during a rainy day). One of the tires leaked air slowly, the AC stopped working, it had like 90K miles on it ... The car made strange noises when going above 30mph, and it rattled above 60mph, the brakes were starting to squeek. All these problems were posted , and people still sthowwed interest in it.