Final answer:
Before entering into a listing contract, a broker like Marcus must explain to the seller how the broker's fee will be split with others, the broker's commission rate, and intermediary brokerage policies to ensure full transparency in the transaction.
Step-by-step explanation:
Marcus, as a broker about to enter into a listing contract with a seller, should explain several important points to the prospective seller. These points include how the broker's fee will be split with other brokers should there be cooperation with other brokerage firms involved in the sale. Another important aspect is the clarification of the broker's commission rate for facilitating the transaction, which is often a percentage of the sale price. Moreover, it is critical to outline any intermediary brokerage policies that could apply if the broker ends up representing both the buyer and the seller in the transaction. All this information should be transparently and comprehensively communicated before the seller commits to the contract, ensuring that there are no misunderstandings or surprises throughout the sales process.