Many people who don't want to worry about getting a license make a nice flyer stating anything great about your eggs.
Farm Fresh
Happy Hens
Free Range
Cage Free
Organic
Non-soy feed
Non-GMO feed
whatever,
then at the bottom print. Not graded, not for human consumption.
But best to sell to friends, family and co-workers but if you find yourself at the flea market or farmers market you should cover your rear.
edited to add my price
I sell to friends for $3 and to strangers for $4 mine are all the labels listed and come in a rainbow pack.