Final answer:
The term for placing a real estate advertisement without disclosing that a real estate broker is involved is 'blockbusting,' a manipulative practice historically used to exploit racial tensions for financial gain.
Step-by-step explanation:
The placement of an ad for the sale of a property through a real estate broker without disclosing that fact in the ad is referred to as blockbusting. This term historically describes a practice where real-estate agents and speculators would stir up fears of neighborhood racial changes to manipulate property values.
They would often advertise intentions to sell a home in an all-white neighborhood to minority families, leading to 'white flight' and allowing them to buy properties at lower prices and later selling them at higher prices to minorities with limited housing options.
Real-estate advertisements may not always disclose the full truth, such as not indicating the presence of a landfill or a factory near the house. Such omissions of fact can mislead potential buyers about the quality or desirability of a property. The advertisements might employ hard-sell techniques and promise easy credit, which can trap buyers into poor value investments, as seen in the case of certain real estate advertisements in Los Angeles.