In the end, it doesn't matter which notary confirms the personal details; that's all there is to it
That is completely wrong. The notary reads the purchase contract aloud during the notarization and points out (if done correctly) any imbalances. He ensures that the parties have understood the content and answers all legal questions related to the wording. This distinguishes notarization from certification, in which only the personal details are confirmed.
I am just surprised that the purchase contract is from a notary who really isn’t just around the corner.
Often, the notary and the seller "know" each other, especially when a larger plot is to be reduced and the entire process is to be handled by a single notary because the seller wants it that way. Basically, it doesn’t matter at all which notary handles the process.
But that there should be no details about the contract beforehand, which one is supposed to sign, I can’t understand—damn seller’s market…
And thus the circle closes. That’s how market economy works. If the seller can find many buyers, he will prefer the one from whom he can get a possible maximum. But that also refers to the complexity of the buyer. Teachers, lawyers, and other "types" sometimes have it harder because they simply ask too many (good) (and bad) questions. During the course of the construction project, they are simply more difficult than those who remain silent about everything or are satisfied with very superficial answers.
For me, it applies: I don’t sign anything I don’t understand or whose implications I cannot grasp. If the seller doesn’t want to be more concrete and clear, then there is no contract with me, and I always emphasize that I diligently spread this fact verbally and in writing—to those who want to know, but also to those who don’t care.
So if he were on the path to cheat or take advantage, he should think that over well during the course of the talks. The worst case would be: no contract and still tell everyone about it.
Buyers also have a good argument: money and transaction security. Then one more property is sold, and the preceding talks were not just costs.
Don’t be intimidated, but negotiate fairly and completely. If you have a bad feeling, then don’t make the contract, but look elsewhere.