4. Gareth Bale | Real Madrid
Highest market value: £70.5m (d.o.v - September 17 2013)
Current market value: £70.5m
Position: Winger, Forward
According to transfermrkt.co.uk, Real Madrid overpaid for Gareth Bale - a sentiment many of you probably agree with.
If any case, he's already one of the most valuable of all-time thanks to football's inflation-busting transfer market.