Considering player signings

I think I need to ask what specifically the user would like: maybe they want a list of players, transfer fees, or links to sources. I could also provide background on key players at Dortmund and suggest a typical starting XI like Haaland, Sancho, or Bellingham. For a "most expensive XI," we could base it on transfer fees or highest market values. I'll check Transfermarkt for Dortmund's record signings, which include players like Dembélé and Haller.Clarifying the most expensive XI

If I'm discussing a "most expensive XI," it seems that only certain players like Haller, Malen, Adeyemi, and Schürrle fit the criteria as costly signings. Sancho and Bellingham wouldn’t qualify as the most expensive, especially if we look at purchase prices. The headline suggests a historical perspective based on peak market values at Dortmund, which could include big names like Haaland, Bellingham, and Reus. Transfermarkt may have a list of top market value players by position, which could clarify things further.Formulating user options

Before transferring to Barcelona, Sancho's departure value was around €80 million, while his peak market value at Dortmund was about €130 million. Haaland peaked at €170 million, which supports his leading position in the XI. I think the user likely wants the full list, but I don't want to make assumptions. It seems best to clarify by asking if they want the specific XI with peak values or the source link. I might propose a few options for them to choose from, and I'll do this in concise Chinese.