Dartin for Divorce

Got a letter the other day from Collectors Auto Insurance, where my dart is insured through, it stated that they will no longer be doing business in the state of Nevada. Now I have to find a new insurance company. My information was passed to Hagerty Insurance and I received a quote from them $116 for the year to insure my car, but that is with my initial 9k value on the car. I want to increase the value but have no clue what the cars value would actually be now.

Any ideas on what I should set the value of my xar at? I was thinking 15-18k? I know it has the rebuilt title but no way I'm getting another clean 69 340 dart with everything I have now for 9k...