Is it permissible to buy more than one car in the names of relatives and friends to resell them in the market, due to the high prices of cars and the limited supply from the dealer who only allows the purchase of one car every five years?

The laws enacted to prevent harm or to observe a public interest must be adhered to, and it is not permissible to circumvent them. The actions of the ruler towards the ruled are bound by the interest of the latter. The questioner himself has clarified the benefit of this law, which is to prevent brokers from buying cars under different names and reselling them at high prices. If everyone adheres to this, the benefit would be widespread, and the price would become affordable for many people.