The price of locomotives, paper-making machines, and aircraft carriers are certainly not determined by auction. It is simply an agreement between the buyer and seller, nothing more. Money, obviously, is not even a measure of value. The price of goods is a measure of an almost limitless number of variables. To make matters even more interesting, the computation of these variables is different for different types of goods.
Price is also a function of time.
The price of a case of ripe bananas will decline as a function of time. In six months it might become negative. In other words you would have to pay someone to take it away. Small wonder that economic analysis based on monetary measures of economic activity fails so miserably. Economics can be referred to as science only in the lightest of terms.