5) Arjen Robben (PSV Eindhoven to Chelsea – £12.1m)
Although the Dutchman only spent three short years at Stamford Bridge, the winger won an impressive six major trophies during that time, including two Premier League titles.
Despite being a firm fixture in the starting lineup throughout his time with the Blues, Robben was surprisingly sold to Real Madrid for £24m in 2007.
