Dmytro Chygrynskiy to Barcelona for €25 million in 2009, about £21.5 million back then. Only Pepe and Ferdinand had been more expensive centre backs prior to this.
In a career spanning two spells at Shakhtar Donetsk, a year on loan at Metalurh Zaporizhya, Dnipro Dnipropetrovsk and now AEK Athens, a year at Barcelona the year after they did their first Treble stands out almost as much as he didn't. 14 games and one year later, he was sent straight back to Shakhtar, recouping a respectable €15 million in the process. The previous year, they had bought Piqué for a quarter of the price, so... not a good investment, all things considered.