There is also a presentation issue: don’t let €391,000 become an implied Berlin “typical apartment” price unless the sample supports that interpretation. I’d describe it only as the observed financing-sensitive range for now. Then ask contributors to label anything they add as a source-linked...
How would you handle an appraisal gap? If the lender values a mixed-use property below the agreed figure, financing proof today may not solve the shortfall. I would decide now whether you can cover any gap and, if so, the absolute maximum—not leave that open-ended.