Sellerbuyer

Sellerbuyer is a term used to describe a participant or system that can act as both a seller and as a buyer within a market. In some discussions, it denotes a hybrid marketplace that supports listing goods or services and enables users to purchase from others. The term is not broadly standardized and is used informally in discussions of dual-role participants in two-sided markets.

In practice, a sellerbuyer is common in peer-to-peer marketplaces and exchanges where users can create listings and also transact as buyers. Key features include user accounts with reputation scores, listing tools, payment processing, and often escrow and dispute resolution mechanisms that help manage both selling and buying activities.

Advantages of the sellerbuyer concept include improved liquidity, faster price discovery, and greater participation. Potential drawbacks involve conflicts of interest, risk of manipulation, cross-subsidization between buying and selling activities, and higher platform complexity that can complicate governance and fairness.

In economic theory, the concept highlights how agents can alternate between supply and demand roles, affecting market dynamics and the modeling of price formation. Related terms include two-sided markets, multi-sided platforms, and marketplace economies. See also consumer-to-consumer marketplaces, where individuals commonly act as both buyers and sellers in the same ecosystem.