If you really want to learn to negotiate take some time and observe young children prolong bedtime.
If you are around kids for even a short time, you have no problem grasping this concept.
Just watch a child in the grocery store. They see something they want and they figure out a way to get it. They ask...not once but numerous times and they use different tactics. They give something in return.. a hug, an "I love you" and they change how they ask and always stay focused on the prize.
And the skilled kids do not lose their cool !
They have found that doesn't work.
They just seem to get cuter and sweeter and melt you with those needy eyes. And most of the time they get exactly what they want and make the adult feel good about giving in.
Think about this in relation to real estate.
What lessons can be learned from the little kids?