When someone gets characterised by their role as buyer of certain assets, the term "buyer" gets new meaning:
A "merchandiser" or buyer 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 evaluation information received.