Final answer:
The Exclusive Right to Purchase Agreement provides the most protection to a buyer's broker, guaranteeing them compensation if the buyer buys a property within the agreement timeframe.
Step-by-step explanation:
The most protection to a buyer's broker is offered by an Exclusive Right to Purchase Agreement. This agreement ensures that the broker will be compensated if the buyer purchases a property within the agreement period, regardless of who finds the property. It represents the strongest commitment from the buyer to work exclusively with the broker.
In comparison, an Exclusive Agency Agreement allows the broker to be paid only if they locate the property that the buyer eventually purchases. An Open Buyer Agreement lets the buyer work with multiple brokers, and the only broker who gets paid is the one who presented the property the buyer eventually buys. The Net Listing Agreement isn't commonly used in buyer-broker situations, as it is more related to sellers, setting a minimum selling price for the property.