It's probably the same as always, if he doesn't take it, there are already 50 others lined up ready to go along with the madness
Could be, but it doesn't have to be. With the plot size and BRW, you already get more than €200,000 just for the land. Add an appropriate little house, and €600,000 is easily reached here without too much effort; you quickly end up at €750,000 all inclusive – then the number of interested parties also starts to thin out.
In the end, everyone has to decide for themselves; I am only pointing out, for informational purposes, the contradiction in the seller's logic. Whether you can enforce that in negotiations or find something better for less than €400/m² is another matter.
Depending on the lending value and the bank's approach, the capital for the access path also completely drops out – it is only common property, not buildable, and burdened with easements/restrictions, so for the banks – rightfully so – it more or less counts for nothing, and then you are very quickly at the symbolic value of €1 as already described.
The entire financing therefore must be secured from the building plot, which means nothing else than that you have to invest approximately 66m² * €370 + €74,000/3 = about €50,000 of "dead" equity.
Not everyone has that in their petty cash.
Best regards
Dirk Grafe