I would have gone a bit higher. I'm in Australia and paid $40(inclusive of post) for my doz
And at $3 a chick I'd say your losing money ( costs to raise-v-sale)
I aim for nil cost no profit margin line as I hatch to entertain my 7 yo autistic son He loves it.
I sell my eggs for eating at $3.50 per dozen. It's really only whatever we have left over at the end of the week - not a business. My students' families empty my fridge every week & bring their own cartons. (The classes are held in my house.) When my daughter hatches as part of her 4H project, we sell off the results at $3 per chick (Easter Eggers or mixes). If the chicks are about 4 weeks or older, $5 b/c we had to feed & care for them. When we had quality purebred eggs, we spent $25/doz+ $15 shipping = $40. Those chicks sold out at $10 a chick, so we could make our money back. There is no way we could have kept all the chicks, so I priced them to move.
I suppose I could sell some of my eggs for hatching because my only roo & 3 hens are all pure orpingtons. Their eggs look different than the rest, but I doubt there's much of a market in our area. I've donated hatching eggs to local schools, but they're the only ones asking. I think one must be NPIP certified in order to sell eggs specifically for hatching.
The eating eggs always sell quickly & help pay the feed bill. I chose $3.50/doz because that's the price for "free range" eggs at the store. Mine are higher quality pastured eggs, so the families get a better deal here. I have a sign up that explains how the eggs are not washed, self serve, BYO carton, etc. I don't do anything more than get the eggs from the fridge & let the kids pick their own. (It's funny b/c the kids fight over my little bantam's eggs, but the adults always go for the jumbos. The blues, greens & speckled are also popular.) In our area, people with small flocks may sell eggs from their homes with no special regulations. A small flock is considered under 100. (To me that's huge!) If I wanted to bring my eggs somewhere- like a farmers' market - they must be properly cleaned, candled, graded, & in new containers. Add the time, equipment, & cost of gas, and I can see why many sell their eating eggs for $5 doz.