Lyon president Jean-Michel Aulas has warned that Alexandre Lacazette's suitors need to cough up a minimum £35m in order to sign the striker this summer.
The 23-year-old has emerged as one of Europe's hottest hitmen after netting 27 times in 33 Ligue 1 outings this season, resulting in speculation linking him to Manchester City and Paris Saint-Germain.
"We will do everything within our powers to hold on to Alexandre," he told Canal+. "You never have any certainties in football, but we are determined to keep him here.
"A transfer fee of €50m [£35m] would not be enough for an attacker like him. He is priceless.
The France international has another three years to run on his contract at Stade de Gerland.