Negotiation between sellers / renters and buyers

Would it be possible to add a module for negociation of the price in the conversation with potential buyers/renters? Like allowing the buyer to send a price request that could be accepted or refused with the possibility of counter offer. I think it would be very useful

Yes, it’s already possible with Marketplace + Requests, customers can post a custom public request (or send a private request to specific vendor), setting the desired budget and allowing vendors to bid, but this feature is not integrated with Bookings yet, if you use Requests and the offer is accepted and paid, there will be a single payment (without selecting dates, guests etc).