The agent of Empoli defender Daniele Rugani says his value has tripled this season.
Rugani has signed for Juventus.
"There's a fundamental difference between being ready to play, and actually playing," David Torchia told Sportitalia.
"He's been redeemed by Juventus, who strongly believe in him.
"He's a very young lad, but he's had good experience in Serie A, and despite not having European experience, in my view he's ready to play for a club with those objectives.
"However, we also have to take into account that he belongs to a club which has the best defenders in Italy and Europe, so it's not very easy to arrive and get a starting shirt for 40 games.
"It's 4m that Juventus have spent, but I think that - at the absolute minimum - his value can now be tripled.
"And I mean this honestly, I don't know if I'd sell him for triple, because it could still increase.
"His growth has been exponential, but I can't say I'm surprised, as we all expected it."