Supermarket eggs have something else that affects flavor that no one in the industry mentions. Age. If you go out and steal your eggs directly from the chicken, and just take what you will need tomorrow you will find they taste a whole lot better. Wash them just before you crack them. Wash your hands after handling them. If you know the farmer, and you treat him or her well, they will just tell you when the eggs are not fresh. They are good for baking and such for quite a while.
Tris
The guy at the farmer’s market every day isn’t a farmer.