How do you sell a car privately?

I cosigned for my son and he stoped paying and droped the insurance on it so they added almost 3000.00 more to the car and when I tryed to get them to take off that 3000.00 I would take over the payments .but now...

After I bought a car from an auction, I discovered that the exhaust system is illegal in California (loud). Are they responsible for making the correction?

16 year old was sold a car without a parent --guy took 800 and will not return it nor give him the car. said he had a week to give him the other 700

I have a 1998 Grand am with 118000 miles how much can I sell this fro?

Can a finance co. sell a car back to the used car dealer,even though payment was sent they say they didn't get it. It's being traced. I've stayed in contact with the finance co.,and even so the payment...