Can you sell your car after the car has been repossessed?

No. A car is repossessed because you failed to finish paying for it. Since you never fully paid for it, it's not yours.

No. You do not own the car once it has been repossessed. To sell the car you would need the title, which is in the hands of the finance company.

After a repossession, usually 30 days later the finance company places the car in an auto auction. There it is sold to the highest bidder. In the rare case that the net proceeds from the sale exceed what you owe for the car (plus interest, penalties, repo fee, etc.) the finance company has to send you a check.

If you can redeem the car by paying the full past due amount plus interest before they place it in the auction sale, then you can sell the car.