FAQ

"Yes, that is allowed. A negotiation does not necessarily have to lead to a sale.
In addition, the seller may want to know whether there is more interest.
It is also possible to negotiate with more than one candidate at the same time.
A broker must make sure to report it clearly.
The selling estate agent will often tell interested parties that a property is, as it is called, 'under offer'.
As an interested party, you may then make an offer, but the estate agent may only enter into negotiations with you if the negotiation has ended with the first interested party.
The broker does not make any announcements about the amount of bids, as this could provoke outbidding. "