I used to feed the duck eggs back to the chickens when I'd have to many and no one buying. I do not have excess eggs here for too long now though. There is one lady who comes every other week and will buy 5-6 dozen if I have them, or what ever I have at the time. Another lady just stops randomly. I think I am going to have to get a bar fridge and start keeping eggs in the garage and put mine and the neighbors in it, so when I don't have enough for an order, his can pick up. I do not advertise now either. People just drive by, turn around and come back and ask. LOL. I am thinking though that I might go and buy a nice piece of wood, cut a chicken shape into it, and then paint it up and hang it from my mailbox post. It'll get more of my eggs and the neighbors sold. then.