Strategy for selling a house - what is the best way to proceed?

I can also hardly imagine that the bank will let it collapse if the appraiser determines a value that is €20,000 lower than assumed. The point is that banks are obliged to appraise the objects that are offered to them as collateral. So far, so logical. The problem is that this usually only happens at a point in time when no one is interested anymore in the deal falling through.

Don’t think anything will happen there either. We also had this expert inspection done. After the construction. What was the bank supposed to do if the expert had shouted "Boo!"? The place was already paid for ^^

Somewhere there is a clause in every loan agreement that in case of changes in the framework conditions (one of which is also the value of the collateral object) the framework conditions of the loan can be changed or a one-time interim repayment becomes due.

"... what if the buyer might not be able to pay?
... wait that long until the financing is SECURED?!"

What's that got to do with the seller?

well, usually as a seller you don't just want a contract (to hang on the wall) but to QUICKLY have the agreed purchase price in your account!

What do you do when the buyer comes to you sheepishly after 6 weeks saying he's short 50k€ ...
he found a 450 euro side job - asking if he can pay off the remaining 50k€ over the next 10 years?

"... what if the buyer possibly can't pay? ... wait that long until the financing is SECURED?!"

well, most of the time as a seller you don't just want a contract (to hang on the wall) but PROMPTLY have the agreed purchase price in your account!

What do you do if the buyer comes to you meekly after 6 weeks saying he's short 50k€ ... he found a 450 euro side job - wondering if he can pay off the remaining 50k€ over the next 10 years?

No, he won't. The bank just takes a few photos for itself. That has nothing to do with the financing anymore.

Our real estate agent advised us to wait with the notary appointment until the appraisal and thus also the loan were approved. Our buyer received his signed loan agreement from the bank only after the appraisal.