There are some houses for rent that would consider lease purchase, first thing is where you are looking, if you are looking on craigslist, it has been plagued with scams of as late. your bets bet is to get a buyer broker who can assist you, make sure they are experienced in lease options. In most cases it is people who need to move but either cant sell their house or don want to sell it at a loss under current market conditions. Thses houses may not even be advertised but tales old fashioned hard work calling or emailing current listings in the mls where you will not face teh scams you face online.
Please read my blogh with tips and advice on how to lease to own a home.