#3 Marc Overmars - £25m from Arsenal (2000)

In the immediate aftermath of Barcelona receiving a world record fee from the sale of Luis Figo to Real Madrid, the Catalans expended a significant chunk of that sum in the Premier League, bringing in Marc Overmars and Emmanuel Petit from Arsenal, making the former the most expensive Dutch and Barcelona player in history at that time
Overmars had been a star in England under Arsene Wenger, playing a key role in the early days of Arsenal's transformation into an elite club under the Frenchman and it was expected that he would bring his good form with him to Camp Nou.
However, that failed to happen as the former Ajax man struggled to replicate his England successes in Spain and was one of the many failings by Barcelona both on ad off the field at the start of this millennium.
His Barcelona career started decently enough, as he ended his first campaign with eight goals from 33 league matches. He, however, did not score throughout his second season, despite making 20 LaLiga appearances mostly off the bench.
In total, Marc Overmars scored just 19 goals from 97 matches in all competitions for Barcelona without any trophy to show for his efforts.
He departed the club in 2004 ostensibly to go into retirement but returned for another forgettable spell with Go Ahead Eagles in the 2008/2009 season.
Overmars is currently the director of football at Ajax Amsterdam and played a key role in getting the Frenkie de Jong deal to Barcelona over the line.