Negotiation is the mechanism by which people trade things of value in a civilized manner.
The first may be characterized as 'take the money and run' in which a negotiator does not consider the concerns of any other party than himself or herself. All this negotiator cares about is 'winning'. Negotiation can be understood as a rewarding human interaction. The tactics and tricks used in negotiation fill many books. The simplest tests are whether parties consider they are being treated fairly and whether each party is honest with others.