What you have not said is why you have 5 cars in the first place or why you in anyway need this one?
Where you may owe more then the book value of the car, the bank might not even let you sell it. You would have to pay down the loan and then you could sell it off.
I hate to say it but your finances are not in good order.
The only people that could not get a loan during the panic of 08-09 where people with under a 700 FICO score. If you were over that, there was money to be lent.
If your not over that, then your finances are not in good order.
So objectively, if this car really offers you nothing as you have plenty others and the loan is a complete turd ( I am guessing somewhere on the order of a $25K loan over 6 years with an 18% APR?)...then pay down the loan ASAP to where the bank will allow you to sell the car.
If you feel you have to keep it then refinance the loan to a 3 year loan with a better interest rate.
The rust, and little issues are not of significance. If you really could afford the car the loan would not be this bad, the banks would have allowed you to refinanced or you would have been able to pay extra principle toward the loan over the past 3 years.
To Barney, that's not America, that's the duality of America has become.
20% of the people are barely enough to even pay income taxes but they want the people like me to bail them out of their mortgages on houses twice the size of mine, pay for their heathcare when they live off fast food, and pay for their kids while I cant imagine having a second because I know I cant afford it even though I make well above the average income in the US.