Well, as an ebaY seller who's shipped 100+ over the past 2 months, I can say that only 2 broke in transit.
It wasn't due to my packing because I tend to overdo it (which costs a fortune in tape, bubblewrap, and popcorn) and the items are very secure.
Of the two that broke, one is notorious for breaking when shipped and the other, I suspect was the buyers fault while removing it from the box.
Anyway, one which was very expensive was insured (thank God) and the other I just sent the dude his money back.
Oh, then there was a person that said one broke, and when I asked for proof, I never heard from him again.
I ship exclusively through USPS and they suck so bad in handling packages, that I'm surprised I haven't had more broken in transit.
As far as me receiving broken statues.. I've received tons in the mail and have only had 2 broken. Spider-Man Movie Green Goblin which was smashed beyond repair (seller ripped me off, IMO), and a Lady Demon FS where the mirror in the sculpt was smashed and her arm broken (I got my money back)