Construction company with "land service"

Hello everyone,
thank you for the many responses. We agreed that the sales department would get in touch with us with a rough offer for a house that we have outlined with them. At the same time, they would finalize this contract for commitment. According to their statement, this contract would be structured so that the real estate transfer tax would apply exclusively to the land. As you can tell, I don’t know any details yet, but I wanted to hear if this is the consensus among the companies.
I would find it acceptable that we have the commitment with Kern if Kern actually brokers the land... and that without the accumulation of the real estate transfer tax.
I would prefer to find my own land and then look on the market for the most suitable construction company or architect, but the search for land in NRW – Düsseldorf area is more than just poor.
Where else can I look for building land besides ImmobilienScout? Should I perhaps contact a broker?

Then he should just show me the properties he can offer. It can even be anonymized. And already the sweat beads form on the salesperson’s forehead

But if he kindly makes a few calls, it won't be long before he can present a property. However, since he has to officially bribe the agent for this, he will only do so once I sign a contract with him.

Hi, I am actually dealing with a similar case:

New development area (framework plan has not yet been adopted, let alone the development plan) with several single-family house plots. The marketer (not the city) said they cooperate with a developer, so I called. They say yes, we have exclusive plots reserved in one sub-area - and the list is already 50% full. If you now sign a purchase contract, you also get on this exclusive list.

However, the land is not sold by the developer. I am waiting for the documents. There is supposed to be a right of withdrawal if you are not satisfied with the remaining plots.

Of course, it is somehow tempting not to have to rely on chance/luck.