7. Dmytro Chygrynskiy – £18million
A lot of people may not even remember this guy or may not have even heard of him, but back in 2009, FC Barcelona paid ÂŁ18million to sign him from Shakhtar Donetsk.
The Ukrainian centre-back spent just one year at the Nou Camp before returning to Shakhtar after he struggled to settle in Spain and failed to break into the Barca first-team.
After an ÂŁ18m move, Chygrynskiy made just 12 La Liga appearances for the Catalan side before moving back to Ukraine for just ÂŁ11m.
The 28-year-old is now playing for Dnipro.