Car Book Value What Do I Do When The Other Partys Insurance Wants Me To Pay More Than Book Value For A Car I Damaged?

What do I do when the other partys insurance wants me to pay more than book value for a car I damaged? - car book value

I was recently in a car accident. Unfortunately I was not sure. Therefore, I am responsible for damages. But the other parties insurance tried to pay me more valuable than your car. I looked at the blue book value on the net. He threatened me with legal action and / or suspension of license. I am willing to pay but they are asking too much. (Twice the blue book value of the car.) What are my options?