You may have noticed that, almost two months before the January transfer market even opens, Real Madrid have completed some extraordinary business during the last few days. They have extended the contracts of: Fede Valverde (aged 25) until 2029, Eduardo Camavinga (21) until 2029, Rodrygo (22) until 2028 and Vinícius Jr. (23) until 2027. The "lowest" release clause written into those contracts is for Camavinga (€900 million), while the highest is Vinicius (€1.5 billion).
It means that while there's not a single elite club in the world that wouldn't bite their own hand off to sign any or all of these players, it's financially impossible to do so unless one of that fantastic group tires of life at the Bernabeu, demands to leave and is granted his wish.