Concur with Jimi that the most ideal antonym for "free of cost" is "available for purchase." But, "acquired" or "priced" could perform as the other of "free of cost." This e-book is free of cost. This guide is priced. That dessert was free of demand. That dessert was bought. as https://kylerydsyx.thelateblog.com/37172212/new-step-by-step-map-for-backlinks-outreach