What kind of nonsense are you writing? PSG has no way to sell Mbappe - none at all. The only thing that PSG can do is get compensation for the early termination of the contract, but if Mbappe just plays for another year, then PSG will receive nothing but his services.
Perhaps you should first find out how the contract system and the transfer market work before writing about it?
I don’t understand why the post of @TheGreatPython is nonsense. Because there is actually logic behind what he is saying. And I don’t understand why PSG cannot sell Mbappé. I think they are actually willing to sell him because if they do not sell him right now and there is actually no contract extension for Mbappé with PSG, they will have to let Mbappé go as a free agent. That certainly is not going to be the best business for PSG. But I also agree that it is not going to be a good business for Real Madrid to bring him for so much money right now.
Damn. Friend, are you kidding? Mbappe is not a thing and PSG have no right to dispose of it. They can only demand the execution of a contract that expires in a year. Clubs do not "sell" players, they only take compensation for the premature termination of the contract. If you do not know this, then it is surprising to me why you write in topics about football.