A Saint Joseph home sales kit is basically a statue of Saint Joseph, which is meant to be buried upside down in the yard to increase the chances of the home selling quickly. It seems that this practice of burying a statue of Saint Joseph to speed up real estate sales became popular in the United States in the 1980's and 1990's, although the origin of the belief dates back much further.
The myth of the Saint Joseph home sales kit states that the statue is to be buried in the yard until the home sells, after which it is to be dug up and given a prominent place in the new home.
There is some controversy over the origin of the practice, as some people point to Middle Age nuns who buried a Saint Joseph medal to gain assistance with getting land for their convent. Another suggested origin is from Brother Andre Bessette, who worked to promote Saint Joseph. According to legend, he buried medals of the saint on land that he wished to purchase to build his Saint Joseph Chapel.
Saint Joseph is a Catholic saint who was the husband to Jesus' mother, Mary. In Catholicism, Saint Joseph is the patron saint of workers and was named as the patron saint and protector of the Catholic Church in 1870 by Pope Pius XI.