6) Zlatan Ibrahimovic – £14.7m (2012)
Age of transfer: 30
Paris Saint-Germain splashed out almost £15million to land one of the best strikers in European football three summers ago and that transfer fee has certainly been repaid by Zlatan.
106 goals in just 126 games for the Ligue 1 champions makes it look like one the best deals in the last century.
5) Jeremy Mathieu – £15m (2014)
Age of transfer: 30
Eyebrows were raised when Barcelona paid £15m to complete the signing of the Frenchman from La Liga rivals Valencia last summer, but after his crucial goal against Real Madrid it was money well spent.