How does St. Joseph help sell houses?

St Joseph allegedly helps to sell a house if a statue of him is buried in it's garden.

Roman Catholic Answer

The Encyclopedia of Catholic Devotions and Practices when describing intercession to St. Joseph in the help of selling one's house: An old, if bizarre, custom regarding St. Joseph is still popular today in the United States. It involves burying a state of St. Joseph in order to sell a piece of property. . . . Perhaps St. Joseph's role in selling real estate arose from his being patron saint of carpenters, but the exact origin of this custom is clouded in history. Although the custom seems to border on superstition, many persons with true devotion to the saint have acted in good faith to request his aid.

Please note that it says "persons with true devotion to . . . Saint [Joseph]. For anyone without a prior devotion to St. Joseph to start burying statues of Our Blessed Lord's foster father in the yard is practicing superstition which is a sin.