The act of taking money from a buyer in exchange for goods or services rendered. An agent sells an object, product, or service to a buyer for a price. Reciprocal of BuyAction.TradeActionactionStatus, additionalType, agent, alternateName, buyer, description, disambiguatingDescription, endTime, error, identifier, image, instrument, location, mainEntityOfPage, name, object, participant, potentialAction, price, priceCurrency, priceSpecification, result, sameAs, startTime, subjectOf, target, url, warrantyPromise