It would be very funny if PSG sold Mbappe at a cheap price, Mbappe's previous value was more than 200 million how could he be left at a cheap price now? besides that do you think with Mbappe's contract extension by PSG they will not benefit? don't be too naive in this case because even if Mbappe's goal is to leave but with the previous contract extension it indicates that PSG does not want to lose their money. Even if in the end PSG will also not be too long in the fry from the price issue but still he will be one of the most expensive transfers in the end.
Even right now nothing is clear about Kylian Mbappé contract with PSG, but one thing is sure his tenure is going to end in 2024 with this trigger is only in hands of Mbappé that can he want to extend his contract or not with PSG can't do anything which is really miserable right now but things will be clear in near future because 31 July 2024 is last date, so hopefully things will be cleared by both parties but most chances we will have new destination for the star player with where he is going it is not clear Real Madrid or Liverpool both are strong candidates for him, but financially Liverpool is surely much better because they are also ready for this all.
If we have him as free agent then surely things will be interesting because Real Madrid wants him as free agent but again if we have something special then surely most chances Liverpool is going to spend huge amount for him.
There are two things I would like to correct in this regard.
First I will straighten out that Mbappe's contract has now been extended by PSG until 2025 so there will be no such thing as leaving on a free transfer for next season but on the other hand he will also definitely leave next season because this contract extension is only a formality so that Mbappe's price does not fall and PSG will still get money in Mbappe's sale.
Secondly I think when talking about financial matters and comparisons of Liverpool and Madrid it is clear that Madrid is superior but even so there is still no guarantee that Mbappe will go to Madrid it's just that the possibility is most likely sure like that.