Take it to Sturgis, enter it in a custom bike show, put a tag on it for what you would be willing to let it go for plus a couple grand. I am sure you will get asking price. people would look at it as an $14k purchased bike with around another $5-7k in custom work. Prob get around $17-20k for it easy if not a little more depending on how you place in the show. I really wouldn't be surprised if you got a $25k offer on it, some people have a lot of money to throw away (and I am not saying they are throwing it away when purchasing your bike). After the sell, you can roll back home on the new Road King.