Manchester United have two of the most exciting teenagers in world football, both of who fans would argue are priceless, Kobbie Mainoo and Alejandro Garnacho. Priceless to Manchester United perhaps, but various outlets use different metrics to calculate transfer values, at more modest prices. Transfermarkt claim Alejandro Garnacho‘s value is peaking at a new high of 45 million Euros, which appears more based on what he has achieved, rather than his sky-high potential. The values should be taken in context. A year ago the same outlet claimed Garnacho’s value was 25 million Euros, and just 30 mi…