I agree, I'm not sure the car salesman example was good. With the landlord-tenant example I should have been more specific. I meant a case that I experienced myself, the ownership had changed and the new landlord wanted to raise the rent. I wanted to keep the old rent, which was my right. In the end I faltered, although I made an overall good deal for me, he managed to raise the rent by using the usual threat: We're going to have to build a balcony. He also cut off my phone cable. A really charming guy.

Back then I didn't know the tricks of how to negotiate in such adversarial situations. Our goals were really just "raise rent vs. keep rent as is". You could say that it was still win-win, though, for example by pointing out that our secondary goals were to maintain good relations and not have any lawsuit.