The type of vehicle and size of vehicle you are going to ship
Some vehicles are just heavier and more valuable to ship than other vehicles. The more valuable the vehicle is the more you are going to pay for the shipment. This is so that they can be covered when something happens to the vehicle during shipment.
If you are going to ship a normal size car, you are going to pay a lot less than when you are going to ship a SUV or even a truck. So, the larger the vehicle and the more valuable the vehicle the more you are going to pay for the shipment.