I've received wrapped in bubble wrap and that crazy unrippable tape wrapped around as if the danged thing was going to ESCAPE.. I'd be surprised if more are not damaged trying to UNwrap them than in shipment!
But today I received a large box of two varieties of quail eggs. This guy had put some of those peanuts in the bottom and simply wrapped each egg in a piece of newspaper (surrounded by more little balls of newspaper) I was amazed that only ONE was cracked.. (there are 80+) and he hadn't even marked on the outside of the box 'FRAGILE' or ANYTHING. Isn't that crazy? Oh, the one line on the outside of the box was "DO NOT RETURN". lol
I use bubblewrap, the heavy duty kind usually, but I use masking tape top and bottom and they are not airtight-there's always a tiny opening on one end or both. I'm not at all sure that matters since I have received eggs wrapped up tighter and they've hatched just fine.