Torino president Urbano Cairo felt Andrea Belotti's price-tag rose dramatically following his eight-minute hat-trick in Sunday's 3-1 defeat of Palermo on Sunday.
The 23-year-old's current valuation is around about the €20m mark, but Cairo insists he would increase the player's buy-out clause if they were to negotiate a new deal.
The deal he signed with the Serie A club, earlier this season, that runs until June 2021, currently has a €100m exit clause, but only for teams outside Italy.
But Cairo feels he has undervalued the Italian frontman.
Speaking to Sky Sports after the game, he said: "If I had to insert a figure in his contract right now I would go for €150 million.
"He scored three more crazy goals, one even better than the other.
"We will have to wait and see whether a team is willing to pay €100 million. I hope not because I want to keep him here. We are just enjoying him and his goals for now."
Torino manager Sinisa Mihajlovic added: "He put in an extraordinary performance.
"He was fighting like always, creating chances and scored three goals. He is the league's top scorer right now and the best striker in Serie A for me."
Belotti now has 22 goals from 24 league games this season.