Final answer:
In a traditional MLS listing, the buyer is considered a customer, not a client (or principal) of the selling broker.
Step-by-step explanation:
In a traditional listing placed in MLS, the buyer is not a client (or principal) but a customer of the selling broker. A customer is a person or organization that pays for the design either directly or through the purchase of a product. In this case, the buyer is not represented by the selling broker as a client, but rather as a customer who is purchasing a product or service.