What I do is buy my boxes at walmart..they have the brown cardboard boxed that are nice and stiff for about .99 cents
The lady at the po was trying to talk me into getting the flat rate boxes but ya, you would have to charge a lot to be able to make anything on the eggs that way, so I see where your coming from when charging that much but most people don't want to pay that much. Good luck selling your eggs. I would love buff orps but can't hatch anything until my BBS orps grow up and get out in the hen house.
You can get the Priority Boxes from the PO for free, and just use actual shipping weight. Thats the cheapest way Ive found to ship. In fact if you go to the PO website, you can order them in 25 box lots, and they ship them to you for free. Cant get much easier than that.
Didn't want to cause any issues....lol....was just clairifying. I was thinking about how nice it would be to have a few more BO around....debating on how bad I wanted them.