As a rule, 10% of the item's value spent on shipping is your best insurance.
I agree fully with this statement!
Extremely expensive items are best packaged in protective boxes and then wooden crated such that they cannot be lifted or moved by individuals...that way they are much less likely to be dropped. They will be moved around only by a forklift.
My experience with Bax Global has been very good. It may cost $300 to 500 in shipping but the chances of a problem are greatly reduced.