I just wanted to say I don't fully agree with completely wrapping shipping eggs in bubble wrap. I think doing so affects air exchange with in the egg. From eggs I have received at the same time (both coturnix) one was wrapped in bubble wrap and was was packed in a carton and shredded lappet. I had only a 10% hatch from bubble wrapped eggs, and 75% on carton packed eggs. I also accept that these hatch rates could have also been influenced by breeder practices, and USPS handling... But once I changed my own shipping practices, my buyers seemed to have better luck.
I do use bubble wrap, but a strip around the middle of the egg, then place the eggs in cartons and pack with shredded paper in and outside the carton.
That's just my opinion
I would really love to know how to ship chicks though. I see people offering them on the swap, and would really like to know how they do it, what they use and the expense of it