You can still sell your camper privately or to a dealership even if you owe money on it with a lien. You need to be completely transparent about the fact that there is a lien, and most times the ownership can’t be transferred until the debt has been paid so you need to try and make a profit that covers it when selling. Sometimes, the lien gets transferred when sold, or a bank offers you a bridge loan that covers the difference between what you owe and what you’re selling your camper for.