Arsenal target Moussa Dembele and his agent are yet to hear official interest from the English club despite reports linking the player and club.
The AZ Alkmaar youngster is reportedly being closely watched by Arsenal officials including manager Arsene Wenger but his agent has not yet heard an offer which has been reported to be £5 million.
"I have not heard, but 5.5 million (£5.07 million) is a ridiculous amount," Vervoort told Het Laatste Nieuws.
"If you consider that AZ have already paid 5 million (£4.62 million) to Willem II (in 2006).
"We know that he has scouts in the picture but real interest? Perhaps in April that will start to come."