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When someone gets characterized by their role as buyer of certain assets, the term "buyer" gets new meaning:
A "buyer" or merchandiser is a person who purchases finished goods, typically for resale, for a firm, government, or organization. (A person who purchases material used to make goods is sometimes called a purchasing agent.)
In product management, buyer is the entity that decides to obtain the product.
A buyer's primary responsibility is obtaining the highest quality goods at the lowest cost. This usually requires research, writing requests for bids, proposals or quotes, and evaluating information received.