Is Price always Determined by Competittion

The price is determined by the competition between buyers and sellers, by the relation of the demand to the supply, of the call to the offer. The competition by which the price of a commodity is determined is threefold.
In this essay I intend to examine the determination of price.
The same product is offered for sale by various sellers. Whoever sells commodities of the same quality most cheaply, is sure to drive the other sellers from the field and to secure the greatest market for himself. The sellers therefore fight among themselves for the sales, for the market. Each one of them wishes to sell as much as possible, and if possible to sell alone, to the exclusion of all other sellers. Each one sells cheaper than the other. …