This is quite hilarious at same time worth doing. Some players have dream clubs where they will love to play, some what higher challenge and some wants to move away by all means due to negative environment. Coutinho's case was for the big money aside Barca being a big club. He was sensational under Klopp only that they lacked trophies. However, knowing that he paid part of his transfer was a clear sign of his desperate to leave for Barca. He got the money but lost the glory that would have come with all Klopp achieved thereafter.
RE: Footballers who contributed to their own transfer fees