The 10 most expensive transfers in football history

1) Christiano Ronaldo - 94.000.000 Euros from ManU to Real Madrid

2) Gareth Bale little bit less than 94.000.000 Euros from Tottenham Hotspurs to Real Madrid
3) Zinedine Zidane - 73.500.000 Euros from Juventus to Real Madrid
4) Zlatan Ibrahimovic - 69.500.000 Euros from Inter Milan to FC Barcelona
5) Kaka - 65.000.000 Euros from AC Milan to Real Madrid
6) Edinson Cavani - 64.500.000 Euros from Napoli to Paris Saint-Germain
7) Radamel Falcao - 60.000.000 Euros from Athletico Madrid to AS Monaco
8) Luis Figo - 60.000.000 Euros from FC Barcelona to Real Madrid
9) Fernando Torres - 58.500.000  Euros from Liverpool to Chelsea
10) Neymar - 57.000.000  Euros from FC Santos to Barcelona

Interestingly, Real Madrid therefore made the three most expensive transfers in the history of football, however accumulate an approximate debt of ~600.000.000 Euros in 2013.

References

http://www.independent.co.uk/sport/football/transfers/transfer-news-gareth-bale-flies-to-spain-ahead-of-100m-move-as-real-madrid-plan-unveiling-8783407.html

http://www.givemesport.com/361162-top-10-most-expensive-transfers-of-all-time)

http://www.transfermarkt.com/en/statistiken/transferrekorde/transfers.html

http://www.forbes.com/pictures/emdm45eedgk/soccers-most-expensive-player-transfers/

http://www.financenews24.com/2013/07/30/the-top-10-most-expensive-football-transfers-in-2013-2014/