We started selling our "extras" at $2/dozen but we had a lot of people not returning cartons as quickly as we needed them to fill the next one. So we bought a box of misprinted cartons for fairly cheap and raised the price to $3/dozen. Except for my one co-worker who is able to get me prescription dog food for $25/30lb bag because she is a vet student (a hell of a deal considering that it costs about $60 for the same bag and that's with an employee discount at work), she can have all the eggs she wants for free as long as the girls are laying. And my mom and MIL get free eggs too. Otherwise, we start a waiting list and sell to co-workers. Between Craigslist and the local farmer's market, $2-5/dozen seems to be the going rate for eggs around here.