Nonetheless, the expression appears in certain early contexts where voter qualifications are Evidently not the supposed implication. From Agree with Jimi that one of the most ideal antonym for "free of cost" is "for sale." But, "procured" or "priced" could do the job as the other of "free of charge." https://docs.google.com/document/d/e/2PACX-1vR1aRmbt0UmT4gxVq4IXbfDVfh2KrMfGfIz30gs2kLcIKk8h4EVktV5g2U8cNCzOTBSOZHhUqlkGaRY/pub