"We are in selling mode when it comes to Camara, who has two years of his contract remaining," he told the club's official website.
"In an ideal world, he would be sold to the highest bidder following a competitive auction on or before June 30, this year.
"There has been interest from Premiership clubs. I have recently received calls from three Premier League club chairmen and have promised to keep them informed of any developments.
"Although Camara is for sale, we will not be pushed into a corner when it comes to our valuation of him - either because we have already received loan fees or because of the controversy he caused last summer when he refused to play for us in the Championship. He remains our player."