That is great! Mike Wolfe of the TV show American Pickers used to run a bike shop and collect and trade antique bicycles. It was how he got started picking. He has always said that classified ads and flyers never worked. What worked was just knocking on doors and asking if people had bikes or other things they didn't want anymore. I guess people don't have the time to try to find buyers, but if someone shows up to buy them, then perfect! They didn't have to do anything but answer the door.
It also makes me realize how my bad my attitude is- I don't want people knocking on my door. Then again, the only times my doorbell has rung it was someone whose car crashed in my yard or they broke down and decided to park in my driveway for the night. Gee thanks! I should have asked for Japanese or Italian bikes in return.