Those valuations are iffy. And here is why - very important. They only matter if someone on the other end is willing to pay the price. Take another big club like United. In the last 2 years, they seen Sancho, pogba, Matic, Cavani, Mata, Lingard, Cristiano, etc., out the door for nothing either with contracts run down, bought out or free loans.
The market for clubs that can afford these valuations is extremely thin. So if we want to sell Saka this summer, we will fetch £120m - because he is a gamechanger. If we want to sell Nelson, good luck getting more than £10m.
The big buyers are down to big 6 in England, Bayern, Real and PSG. The next tranche are buying value - so might go for a Patino. But that middle market of moving around veterans is busted.