Shipped eggs are very hard to hatch. The only ones that do well for me are quail. Other types of eggs usually don't make it too good. Every once in a while, I'll get lucky, but I usually get 1 or 2 chicks from 12+ shipped eggs. Not all the time, but most. If I could find what I want here, I wouldn't even bother.
Sometimes you get a good hatch, most times I get a 30-50%. The one time I actually picked up eggs from a seller that lived nearby. I got 16/18 eggs to hatch. So shipping does play havoc on them. My problem is the breeds I want are not around here and I like to be a respected breeder around here, so I have to play russian roulet with eggs.