Bild mentioned 175 million euros (and no, that's not a currency typo).
The fee difference may be bigger but you're talking about a club who have a history of holding onto a player for one more season and then either selling them at a cheaper price (e.g. Sancho) or letting them go for free (e.g. Lewandowski). Dortmund might be a selling side but they also still have interest in being competitive. If Dortmund are really concerned about getting less money next year, they would not have said all year that Haaland is not for sale this summer and they are also not under any financial pressure to sell. So, I don't think it's a foregone conclusion to just say they will accept our offer immediately. More importantly, we gotta actually table the bid in if we want to make it happen because right now, nothing seems to be actually happening and it's all just empty talk after empty talk after empty talk. And oh, there are also tons of recycled BS.