Hi. I also have a very similiar car and spend a lot of time watching its value (the more I spend on it, the more I look, lol).

I would agree $20k is a minimum, but prob not more than $24k. Depends if it shows really nice and is cancer free. I would consider getting the dent repaired.

Also, I have had very good luck with Craigslist. Sold a 65 Galaxie Convert that went to buyer in Sweden in just one week. Good luck. You'll prob get some offers just by asking the question on here.