real estate broker

  a natural or juridical person who, on behalf of a principal and for or in expectation of commission, fee or other valuable consideration, negotiates the sale, purchase, lease, exchange, or mortgage of real estate. any person, natural or juridical, who is an agent of another person and for or in expectation of a fee, commission of other valuable consideration, shall perform any of the following acts; offers, advertises, solicits, lists, promotes, mediates, negotiates or effects the meeting of the minds on the sale, purchase, exchange, mortgage or lease of, or joint venture or other transactions in real estate or any interest therein.

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