The macaw is really a magnificent, large parrot celebrated for its brilliant plumage and spectacular dimensions. Concur with Jimi that by far the most acceptable antonym for "free of charge" is "available for sale." But, "purchased" or "priced" could do the job as the other of "free of demand." https://griffinrjapc.total-blog.com/not-known-facts-about-talking-parrots-for-adoption-62052082