For sellers, there is more risk than benefit with a lease-option purchase. You have a lease tenant, but you may or may not have a sale at the end of the lease. Not every lease-option makes it to closing. As compensation, you'll have the buyer's down payment, but you won't have a sale. Plus, the condition of the property may require repair and improvement to ready the property for the market.
Lease-option purchases happen infrequently for a reason. There may be some advantage for a buyer who has no other option, but the risks outweigh the benefits for sellers.
Hope that helps,