They can be treated as a commodity as they are graded on value. How would a commodity market work if each instance of the commodity had a different value? Both live steers, and their resulting leather, beef and other byproducts are sold based upon weight and&#x2F;or grade.<p>For example, &#x27;a cow&#x27; is not a commodity... but a grade 3 live steer is.<p>Movie theatres do not price films based upon quality, but the distributors certainly do (I managed a movie theatre). You cannot commoditise a movie ticket, each theatre provides different facility and presentation quality.