Twente admit Inter Milan must drop price to get Castaignos deal done
Twente find the price for the young Dutchman too rich.
"There is a gap between how we value the player financially, a difference between what they want and what we are offering," Twente chief Joop Munsterman told De Telegraaf.
"The Italian club are not in a hurry to sell and there is the possibility that this transfer could take some time.
"We will not be rushed into making a decision."