Unfair trade practices involving agricultural land

A few weeks after selling his business, an entrepreneur received a call from an unknown number. The caller confirmed what he already suspected: if he left his assets in the bank, they would not yield much. The offer he then received almost sounded too good to be true, and unfortunately, that turned it was.
The entrepreneur purchased several plots of agricultural land. The seller claimed to have contacts with the municipality and reputable real estate developers and that the land would be rezoned for construction in about three years, at which point it would be worth many times what it cost. The entrepreneur invested hundreds of thousands of euros, but the land did not increase in value. Years later, he read about a very similar story and realized that he had been scammed. His overpriced land yielded a few euros in rent each year, but there was no prospect of a change in the zoning plan and the land was unsellable, even at normal agricultural prices.
After analyzing the brochures used to promote the land for misleading texts, the municipality was contacted. The municipality confirmed that the land was definitely not earmarked for housing and that there would be no need for it in the future in this shrinking region. The agreement was then annulled on behalf of the entrepreneur and repayment of the purchase price was demanded. The seller refused, but was eventually forced to do so by the court.