Real estate agent and trainer Rich Levin is the author of “Top Ten Negotiating Rules for Realtors.”
I can personally attest to the validity of the first two:
One. Don’t go back and forth between a buyer and seller more than twice.
Two. Don’t let the buyer and seller come to dislike each other.
In fact, rules #1 and #2 are very much inter-related.
In my experience, a real estate deal with one or two rounds of back-and-forth is a negotiation; three or four (or more!) usually becomes . . . an argument.