5. Hernan Crespo - £35.5m | Parma to Lazio in 2000

Having reaped the financial rewards from selling Vieri to Inter in 99, Lazio blew their budget (and then some) on Crespo just a year later.

Crespo lifted the Italian Cup in pre-season with the Italian outfit, though that was all he won during his two-year stay.

Real Madrid
Cristiano Ronaldo