I know there is a special clause in Haaland's contract. At the end of this year, it will be possible to transfer with an active substance and a certain testimonial fee. Borussia Dortmund is very strong economically. They usually bring young and potential football players to the world market. They usually make very good profits, although sometimes they can't do what they want. They will also make a good income in the Haaland transfer. They could also find another young player with potential to replace Haaland. Dortmund's Scout team is one of the best in the world.