Shipping tortoise eggs?

There is currently a vendor selling tortoise eggs. I am curious as to whether the transportation process would damage the eggs or render them unhatchable. Does anyone have experience or an opinion? I would think that if a well known vendor sold eggs and none hatched the subject would come up in the BOI, and this vendor has no adverse BOI reports, but I am still curious about the general subject.
There is a completely different issue, the sale of parrot eggs, and that is often a scam because of the low cost of the eggs compared to the very high cost of the birds which may run into many tens of thousands of dollars, plus there are various national export statutes, so I feel the two subjects are not comparable.
But I'm mostly interested in the biological explanations, and whether temperature and positional fluctuations during shipping would have an affect on the eggs.