Answer:
Bait-and-switch advertising.
Explanation:
BAIT AND SWITCH ADVERTISING is a type of advertising where a seller of a products or goods deceive a prospective buyer by advertising a product that is desirable in which when the buyer make an effort to purchase the product or ask to see the advertised product the seller will show the prospective buyer available product instead of the advertised product in which the buyer will then find out that the advertised product is unavailable just as in the case of John who advertised a desirable property that was already sold out a months ago in order to attract prospective buyers in which when the advertised product was ask by the buyers he shows the buyer available properties instead which means that this act by Broker John is an example of BAIT AND SWITCH ADVERTISING.