After the departure of Neymar Barcelona has made an official offer to Borussia for Dembele. The offer is said to be 70 million euros plus bonuses. It is a significant offer but not enough to convince the German club. They are asking for more in order to allow Dembele to leave the club.
The negotiations for Dembele are closely related to Milan's pursuit of Aubameyang. Borussia will not sell both players so at the moment the rossoneri have to hope that Dembele himself declines the opportunity to join the blaugrana, which can then allow Aubameyang to leave.