$3/dozen unsized - I looked around at what others in town charge and did likewise. Because of my mix of birds there are usually 2 brown bantam eggs from my Mille Fleur d'Uccles, 2 large brown eggs from my Wyandottes and the rest are white from my Andalusians in each dozen.
I want to get some Marans and/or EEs as my marketing research indicates that people really like the variety of colors. I am pretty excited that there is the market for me to get double what eggs sell for in the market, but my neighbors see that my birds are happy, healthy free-range birds and know that my eggs are always less than a few days old. IMO that adds value and by the consensus of this thread, lots of people agree!