2) Nicolas Anelka (Paris Saint Germain)
Arsenal grabbed Anelka from PSG in 1997 for a minimal fee, and the Frenchman enjoyed plenty of success at Highbury – winning the double – before leaving in a £22.3m deal to Real Madrid, with Arsene Wenger reportedly sick of his attitude. A year later, the French side paid £22m to bring his back to the capital.