I've never heard of an insurance company charging full price for a 2nd car, especially if this 2nd car is less valuable than the primary vehicle. In most cases it should be heavily discounted or a small token amount. Think of it this way, if your primary car is a Porsche and you're paying $150 a month then you go out and buy a '95 Buick, the insurance on this 2nd vehicle should be practically nothing. Why? Because the insurance company wants you to drive the Buick as much as possible because you are already forking out a heavy premium on the Porsche, and the more you drive the Buick, the more likely you are to get into an accident where they only have to pay out a fraction of what they would if you wrecked the Porsche.