Appreciate the advice and it is already on craigslist. I am actually considering dropping the price to an even 14k, just so I can see it go.
As for the ex part - she is on the lien so as I said, I cannot keep the car. Ex's and liens don't mix. Shouldn't have had her on the loan to begin with, it was a bad mistake on my part. And refinancing is not an option as I hardly even had the credit to get the car by myself in the first place.