Gent director Michel Louwagie insists Jonathan David will not leave the club cheaply this summer.
Manchester United, Arsenal, Inter Milan and Borussia Dortmund are all interested in the 20-year-old striker.
"In January, a record offer was on the table, but we turned it down," Louwagie told Het Laatste Nieuws.
"It's wonderful that we have a top scorer in David, but most of all, we want to keep him. In any case, we won't let such a player leave for €25 million (£21m/$27m)."