Montpellier coach Michel der Zakarian admits they risk losing star striker Elyi Wahi this summer.
The youngster is being followed by Arsenal. Bundesliga giants Borussia Dortmund are also reported to be keen on Wahi.
Der Zakarian said: "The kid, he's 20, and full of talent. That costs a lot. For me, minimum €25-30m.
"When you see the TV rights over there, England can buy him. It's easier for them."
He added: "Where he can improve? He needs to work on his volume, needs to run a lot more, always be moving and be in a position to repeat the efforts. If you don't have the fitness…
"He's a sprinter, he goes really quickly, but sometimes he's knackered after 45 minutes.
"He needs to work a bit better, that's every day at training. If he wants to play in a big club and play with great players, he needs to work hard. He can go very far, at a very, very good level.
"Scoring goals like he does, you need to put them in the back of the net.
"What he does is good for his age, but I think he can do even better."