Selling is offering to exchange something of value for something else. The something of value being offered may be tangible or intangible. The something else, usually money, is most often seen by the seller as being of equal or greater value than that being offered for sale. Another person or organisation expressing an interest in acquiring the offered thing of value is referred to as a potential buyer, prospective customer or prospect. Buying and selling are understood to be two sides of the same "coin" or transaction. Both seller and buyer engage is in a process of negotiation to consummate the exchange of values. The exchange, or selling, process has implied rules and identifiable stages. It is implied that the selling process will proceed fairly and ethically so that the parties end up nearly equally rewarded. The stages of selling, and buying, involve getting acquainted, assessing each party's need for the other's item of value, and determining if the values to be exchanged are equivalent or nearly so, or, in buyer's terms, "worth the price. "