Recently Manchester United is eying for the France's mid fielder Paul Pogba. If this deal happen then it would be expensive transfers till now.

Before this Real Madrid did the costliest transfer for the Gareth Bale in 2013, they purchased from Totteham to Real Madrid.

Even before Bale's transfer Madrid was on top because of Star player Critiano Ronldo. Madrid done deal in 2009 with Manchester United for him of £83.7.

Mostly Real Madrid, Barcelona, Manchester United, Manchester City and Chelsea are doing or not afraid of doing more expensive transfers as compare to other clubs playing all around the world.

Even recently Bale did contract with the Real Madrid to play life time for the Madrid and because of this he became the most expensive and most earning player in the world.

 
Top 20 Most Expensive Transfers of All Times
NO#PLAYERTRANSFERFEE
1gareth bale salaryGareth Bale (2013)Totteham to Real Madrid£93.1
2Cristiano RonaldoCristiano Ronaldo (2009)Man Utd to Real Madrid£83.7
3suarezLuis Suarez (2014)Liverpool to Barcelona£75m
4Neymar (2015)Santos to Barcelona£71.5m
5Kevin De Bruyn (2015)Wolfsburg to Manchester City£69.7
6James RodriguezJames Rodriguez (2014)Monaco to Real Madrid£63m
7Zlatan IbrahimovicZlatan Ibrahimovic (2009)InterMilan to Barcelona£40m+Eto’o
8Angel Di Maria salaryAngel Di Maria (2014)Real Madrid to Man Utd£59.7m
9KakaKaka (2009)AC Milan to Real Madrid£56m
10Edinson CavaniEdinson Cavani (2013)Napoli to PSG£55m
11Raheem Sterling (2015)Liverpool vs Manchester City£55.2
12Angle Di Maria (2015)Manchester United to PSG£49.7
13Radamel FalcaoRademal Falcao (2013)Atletico Madrid to Monaco£51m
14David LuizDavid Luis (2014)Chelsea to PSG£50m
15Fernando TorresFernando Torres (2011)Liverpool to Chelsea£50m
16Carlos TevezCarlos Tevez  (2009)To Man City£47m
17Zinedine ZidaneZinedine Zidane (2001)Juventus to Real Madrid£46m
18Mesut OzilMesut Özil (2013)Real Madrid to Arsenal£42.4m
19James RodriguezJames Rodríguez (2013)FC Porto to AS Monaco£38.5
20Luis FigoLuis Figo (2000)Barcelona to Real Madrid£37m
21Hernan CrespoHernán Crespo (2000)Parma to Lazio£35.5m