Barcelona have made some questionable transfers of late, with the arrival of Kevin-Prince Boateng being the absolute shocker of all shocks. However, now and again, the Catalan giants still unearth some hidden gems. The story of a young Lionel Messi being signed on a restaurant napkin by Charly Rexach when he was a young trialist from Argentina is the stuff of legend in footballing folklore.
The list of inspired acquisitions at Camp Nou throughout history could continue for pages, but let's cut to the chase; in the summer of 2018, Ernesto Valverde signed a young promising Brazilian from Gremio for £27m.