With no one want to buy him for 18M and he is still pretty good, I think we should keep him until the end of his contract (2021). Buying decent striker (Milik) who has one year left of the contract for 40m is waste of money. Better do a Bayern behavior, keep Higgy for 1 year and getting Milik next summer on free transfer. After the Arthur - Pjanic deals, we are not in desparate for cooking the book anymore.