1. Saying too much during an offer The first and second rules of effective negotiating are to a) know what you are legally required to divulge, and b) don't say anything more than this in front of someone who is not completely representing your interests. It's very important that a seller think through every point he or she is going to make . . .before it is spoken. What you say can and will be used to your buyer's advantage, so don't say anything more than you have to. For example, if you are reviewing an offer in front of both your (5 comments)