Its too bad that you can't get more for your eggs but I have seen on a chicken forum that many parts of the country cannot get much more for their eggs and some will pay almost anything.
I have been selling my eggs for $3.00 per dozen to the local people here but will be selling them for $4.00 per dozen at the farmer's market because they said that is what people expect to pay and they don't want me to undercut anyone else there that may be selling them for the $4.00 (they did last year) but I could probably get more if I wanted for the rainbow eggs.
People sell their plain old brown eggs for $4.00 dozen and they go nuts for the colored ones.
My black copper marans are laying those deep brown reddish eggs now, along with the ones that lay blue, green, ivory, white, brown.
I put two of each in a dozen(in a clear plastic reuseable carton) and they practically want to frame them.
People are funny, they practically want to display them.
I had a lady from the bee club buy some from me the other night as a gift for someone.
Fresh free range eggs are popular here, I only feed them organic feed too but I don't advertise that because you can't say anything is truly organic unless you want to spend thousands of dollars to get certified and I am just doing this to unload all my extra eggs.
Besides how do I know that every bug or worm they eat is organic?