Finding Seller Financed Notes.

Hello everyone please excuse me but I've searched for an answer and havent found one yet so I'll ask and if you can guide me to an answer then cool. I purchased the book and I read as one of the ways to come up with money for real estate if you have bad credit and no money is to find people that have offered seller financing on there property and see if they want to sell the paper for a discount so they can have cash now and you get a finders fee for hooking them up with a buyer. My question is how do I go about finding people with owner financed properties to see if they want cash now?