90m would absolutely smash our previous record.
IMO this would be like getting Hazard at 21 when he left Lille, or Neymar from Santos.
Very clearly headed to being one of the best players in the world, and getting him at 21, bonding him to the club from a young age, having him learn under Pep and play with KDB, Aguero while they're still here.
I really hope we pull it off. What the Americans would call a "franchise player".