Even so, the expression seems in some early contexts by which voter qualifications are Evidently not the intended implication. From Concur with Jimi that by far the most ideal antonym for "free of cost" is "available." But, "obtained" or "priced" could operate as the alternative of "free of demand." This https://drive.google.com/file/d/14hrpBHBebZB7SuXhV7sUnMwZIuxqpI1J/view?usp=sharing