My best profit is if I can sell day old chicks. Pullets sell high, but they rarely last long enough for me to sex. I'll be honest, I'm too selfish to sell my own eggs locally. I'm not wild about a local with an incubator competing with me with my own chicks
ETA: let me explain that statement. If someone buys chicks, raises them, breeds them, then sells those offspring I have absolutely no problem with that. I have sold eggs twice, to people that claimed they just wanted some eggs for a broody, and I saw those chicks advertised on Craigslist a week before they were due to hatch. That put a bad taste in my mouth, and I don't sell eggs any more. I sell the extras as eating eggs to my egg customers
Just to make sure someone isn't trying to profit from your breeding programs by buying your eggs for the table and hatching them it is a good idea to put a cock of another breed and/or variety over the hens. I don't sell any eggs, but this is something I also do before selling laying hens locally after each breeding season. If the buyer hatches those first eggs they will get Easter Egger chicks. This is not to be mean...if they want top quality chicks from me they should place an order and pay for them like honest people do.