You bring up a good point. I reread the thread starter's post and he does start out by asking about the true monetary cost of backyard eggs, however his further comments kind of dilute the question and bring emotion and other values into the equation.
I'm working on actually making a profit from backyard eggs, and I'd love to share my results. However, it will be at least 6-9 months before I have any halfway decent numbers, and even then it will take at least a couple years to come up with a somewhat accurate assessment.
I do agree with you about the irritation of backyard eggs being undervalued. Perhaps those that sell their eggs for no profit or a loss feel pressured to sell low, temporarily have too many eggs and just want to sell them cheaply, view it as a hobby and want to "share" it with others. I don't think they realize the damage they may do, continuing the public perception that eggs should be super cheap. Factory eggs generally have a much higher "cost" than what they sell for. This often results in environmental damages, exploitation of limited resources, government subsidies, exploited workers, mistreated animals, and perhaps more. It would be nice if the public realized that responsible backyard producers are not ripping you off by selling eggs for $3 a dozen. If anything it's the other way around.