If he doesn't even know whether he is selling the house entirely or in parts, he probably won't present it yet
Could be, but doesn't have to be. The division might have already been completed a long time ago. Maybe he (consciously) doesn't even know, for example if the house was recently inherited, etc.
I wanted to bring this aspect to the table, as it is not insignificant for the further course of action, especially since it causes costs and has a significant impact on the scheduling. Thus, it is no less important than the above-mentioned boundary to commercial activity.