Tips for negotiation from Buddhism

What are the teachings from Pali canon on negotiation in a business or social context? I have read tips such as not to make a false negative attitude on someone's property and acquire it. It is a form of stealing. Or sometimes the buyer will make techniques not to pay the real value. It is also a form of stealing according to Buddhist texts. So my concern is on how to negotiate on things/price such that all the parties involved get happy. I will be really grateful for an answer with some references from Pali Canon or from the teachings of a Buddhist scholar. Thanks in advance.