What do you do if your car was totaled in an accident and the insurance company doesn't want to give you what you have found on the internet for comparable vehicles they say they can find it cheaper?

Keep in mind that the insurance company will compensate you for the actual cash value of the vehicle. This means the amount of money that it would take to replace the vehicle. Insurance companies do not use advertised prices to determine actual value. When was the last time that you actually paid "sticker" price for a vehicle?