This provisional ranking could still see major changes once any of the huge transfer rumours are confirmed.
Mbappe, Dembele, Verratti or Coutinho, Europe's top clubs could break the market and cause a 'domino effect'.
As of now, these are the most expensive players to switch teams:
10. Leandro Paredes (Zenit)
23 million euros
9. Youri Tielemans (Mónaco)
25 million euros
8. Davy Klaassen (Everton)
27 million euros
7. Jordan Pickford (Everton)
30 million euros
6. Victor Lindelöf (Manchester United)
35 million euros
5. André Silva (Milan)
38 million euros
4. Ederson (Manchester City)
40 million euros
3. Corentin Tolisso (Bayern Múnich)
41.5 million euros
2. Mohamed Salah (Liverpool)
44.5 million euros
1. Bernardo Silva (Manchester City)
50 million euros