The Irishman has seen three bids for the 22-year-old Wigan full-back rejected by his club with manager Chris Hutchings insisting the player has told him he does not want to leave.
However, Keane said: "Just because a club says a player is not for sale - if that was the case, nobody would ever move club. I am sure Everton told Manchester United Wayne Rooney was not for sale, but they got him, so we will see."
© Copyright PA Sport 2007, All Rights Reserved.
Do YOU want to write for GiveMeSport? Get started today by signing-up and submitting an article HERE: http://gms.to/writeforgms