In fact, there were more than just those three transfers at Arsenal Club. Several other players arrived in London one after another.
However, because these players' transfer fees were not as high as Buffon, Nesta, and Beckham's, and they were not as famous, they did not cause a sensation.
For example, Ronaldinho was brought from Paris for 30 million Euros.
Ronaldo was purchased for 30 million Euros.
Messi was brought in from Barcelona for 5 million Euros!
The reason Messi was able to be secured for such a low price was that he had only just turned sixteen years old at the end of June. Just before his birthday, David Dain had made a secret trip to Barcelona and settled Messi's acquisition.
According to UEFA regulations, youth players under the age of sixteen cannot sign professional contracts. Youth contracts are signed yearly, and players can choose to transfer freely when their contracts end!