Don't burn a bridge. Be honorable and look for the long term in all dealings. Uncover the true objection or obstacle . By listening, questioning, and qualifying, you can ferret out the real stumbling block. Take the blame, win the point .
Fault is less important than winning.
It helps you to remember points, and to avoid interrupting. Know your trump and when to play it . Save your best tactic, most valuable information, best price, or best benefit until you need it. By finding out the true objections early, you have a better chance of getting to deal without major hassle. In negotiation, preparation can beat size and strength .