You can contact rent realtors that will search their listings for these sales. A lot of realtors such as those who own the properties offer rent to own. But this is usually found with certain realtors or real estate business that sell only their properties. You maybe required to purchase an option/contract plan. Regular owners don't want to rent, sell options and may not consider rent to own as an offer. However, the best place to start is rentals. Ask for a rent to own lease and maybe they will have owners who are interested in renting and selling.