We sell our extra eggs, $4 a dozen. (Our neighbours are farmers, they are selling their eggs at the farmer's market for $5 a dozen). My husband owns a small gas/variety store, but we're not allowed to sell the eggs there as they aren't graded (the eggs range in size from a little green Easter Egger's to ones that are so big the egg carton won't close). We keep what we want, but my sister and brother-in-law, who work in the city, take any excess. At the moment, demand is exceeding production. People in the city are going nuts for these eggs.
We have a small flock, 2 roos with 8 hens each (unfortunately, we had to euthanize one hen and lost two more to a coyote in the past couple of weeks, so production is down to about 10 - 12 eggs a day.) What we get from selling the eggs covers their feed and scratch, with a little leftover that if we need a new feeder or waterer (or to buy wild bird seed), it covers that. I have thought of increasing the flock, but really don't want to have too many more -- maybe another 6 hens to replace those we lost and a couple of extra.