About the CAR Selling

I have a 2015 Hyundai Santa Fe with a $14K loan on it, and it has some structural damage (though it doesn’t impact much). I recently spent $3K on repairs, but when trying to sell it, I’m only getting offers around $8K to $9K. If I decide to sell it at this price, would I need to clear the loan first?

A friend suggested that I hide the car and claim it as stolen to utilize the GAP insurance. I would greatly appreciate your advice on this situation.