Watched a short interview with Wolfsburgs Director of Football Klaus Allofs on the German SSN last night. It was made outside of their training camp, so new. He repeated the known statement that Wolfsburg does not want to sell any players, but then went on about no offers being on the table and how one can never know what happens. It sounded to me as if he is willing to consider selling at the right conditions. The whole story was given the headline "Disturbances concerning Perisic and De Bruyne" by SSN, so there is smoke, and where there is smoke they is also some kind of fire, right :-)
Allofs is in general known as a cool businessman, who is not afraid of buying and selling players. So if he acts according to his nature he can certainly be negotiated with. I am getting more optimistic about this, but for sure we will have to pay up here. Wolfsburg does not need the money, and you cannot fool Allofs.