How do we value our cars?

So over the weekend I had an accident and now I am concerned with valuing the car. I have antique insurance and told the insurance company my 65 Barracuda /6 (Hopped up) was worth 18-20k. I got that number from the Haggerty valuation tool. Nada values my car with a slant at 16k.

As the title states how do we value what our cars are worth?

thats a tough one. i have an agreed value plan. my car is insured for 35k. if its totaled that is what i get. the only bad part is if you want to buy the total back they will charge you on a scale of that agree'd value. that being said i have over 25k in reciepts and i know my car would be lucky to fetch 15k on the open market.