If I were you!!!
I would start with estate sales!, I have found some real gems there,Also,get off the interstate while traveling,go the back roads, thru every little town on the map,stop at every old appliance or furniture store,as well as hardware stores,I found a store that had 3 old washers on the showroom floor,2 Philco toploaders and a Duo-Matic,my friend Jerry in Winston Salem got the Duo Matic and I got the 2 Top loaders,which I had a friend sell for me!!!.