9) Adam Lallana (Southampton to Liverpool) - £25m
In 2010, Southampton were in League One. By the end of the 2011/12 season, they were back in the Premier League - this time for good. And not only was he rewarded with a spot in the Championship Team of the Season, but he was given the Saints' armband as well.
A midfielder who could also play on the wing, Lallana was a tireless player who gave it his all for the club from the south coast. His fitness was also one of his key attributes, even starting all 38 games for the club in his final season with Southampton (2013/14).
Southampton had done well after promotion and they finished eighth that season, with his contributions earning him a Player of the Year nomination and a spot in the Team of the Year.
Liverpool (who have since treated Southampton as their feeder club) stepped in and he was off to Merseyside in a £25m deal as the Reds dismantled that side, even signing Rickie Lambert and Dejan Lovren in the same window.