If it's a bird that's known to speak, definitely to speak a word or two. Cause it would assure a potential buyer that the bird wants to learn to talk. I really hope my conure at least eventually learns to mimic sounds if not speech. I think it's awesome when birds can make more than bird calls or screaming noises. That's sort of one of the most defining features about a bird imo. Sure they have flight, but it's not like I can climb onto their backs and go for a ride.