I have just started selling in front of our house, but when we ran out of eggs, my MIL (they also raise chickens) brought some of their eggs over because they somehow had an overflow. I sold 5 dozen in one day easy. And I haven't even really built up a customer base yet!
I have had one lady stop several times and told me my eggs are "FANTASTIC". 
I put 2 dozen out the other day (all I had) and the guy that stopped told me his wife checks for my sign all the time. If I am out of eggs, I hide the sign behind a pine tree.
I'm sure I will have no problem selling all my eggs. I figure if I ever have a huge overflow I will see about donating them to the food pantry.
Right now, I have only brown eggs.