Im so sorry you've had bad experiences with shipping eggs. But, I'd like to make something clear that may not be.
Fertility can only be proven by cracking open eggs to check for the fertile bullseye. Lack of development does not prove infertility.
This is the big reason I don't ship eggs anymore. I frequently check fertility and, of the eggs I've sold, I've never had any infertiles... just fragile eggs that didn't develop. Depending on the PO, I might get lucky and a couple people have hatched a couple eggs but the percentages were way below satisfactory. It seems the nicer the quality of the stock, the more fragile eggs can be. Birds bred tight for the show room frequently sacrifice other qualities such as strong embryos. I never have a bad hatch here, but shipping has been a nightmare.
So before you throw the INFERTILE hammer, please take this into consideration. There is any easy way to check fertility even after incubation has begun.
So, if you are looking for excellent quality seabrights, you will probably have much better luck purchasing started birds from a reputable breeder.