What is the term for when a seller's agent also works for the best interest of the buyer in a transaction?

In a real estate context, the situation described refers to the concept of dual agency. This occurs when a single agent or broker represents both the seller and the buyer in the same transaction. In this situation, the agent has a fiduciary duty to act in the best interests of both parties.

The correct answer aligns with the term "broker," as brokers are licensed professionals who can operate in a dual agency capacity, provided that they meet their state’s regulations and disclosure requirements. A broker can act on behalf of more than one party in a transaction and have the responsibility to balance the interests of both parties while negotiating terms that are agreeable to both the buyer and the seller.

The other options do not accurately describe the role of an agent representing both buyer and seller in a transaction. A realtor typically refers to a real estate agent who is a member of the National Association of Realtors and may not specifically denote the dual representation aspect. A negotiator generally refers to someone involved in the process of negotiation without the broader implications of agency relationships. A facilitator, while involved in helping parties come to an agreement, does not hold the same level of fiduciary responsibility as a broker does in managing such dual representation.