They have a long plan with Nunez so they dare to charge a high price. I'm sure Liverpool have reasons for that, the potential he has lured Liverpool to sign him for quite a long time. But surely with that Nunez has to pay with the game he deserves, which can be more convincing Liverpool did not choose him wrong.
I think Liverpool will not be wrong at all if they choose Nunez for the long term because he is still very young and Nunez also has very good performances in football. He comes from Uruguay who also graduated from a very good football academy so Liverpool will get a lot of strength if they can get a young player like Nunez for next season because other clubs are currently also eyeing young players like Nunez.