Real estate broker means an individual or business entity that, with intent to collect or receive a fee, compensation, or valuable consideration, sells or offers for sale, buys or offers to buy, provides or offers to provide market analyses of, lists or offers or attempts to list, or negotiates the purchase, sale, or exchange of real estate; that negotiates the mortgage of real estate; that negotiates for the construction of a building on real estate; that leases or offers or rents or offers for rent real estate or the improvements on the real estate for others, as a whole or partial vocation; that engages in property management as a whole or partial vocation; that sells or offers for sale, buys or offers to buy, leases or offers to lease, or negotiates the purchase or sale or exchange of a business, business opportunity, or the goodwill of an existing business for others; or that, as owner or otherwise, engages in the sale of real estate as a principal vocation.