Having a good scouting network, as well as a team of smart transfer negotiators, can really help a club make significant profits in the transfer market.
Premier League sides have not always been the smartest when it comes to recruitment but, over the last ten to twenty years, they have developed into savvy operators.
Picking up promising talent before their potential is realised and then offloading them on for huge profits has served quite a few teams well. Others, however, have simply lost their best players to rivals with deeper pockets.
Press the next page as we count down the biggest profits that English clubs have made on selling players (based on data from Transfermarkt).