Something unusual must have occurred with 3refs shipment.

I collect stamps and coins, many of the latter in original containers as well, and over some 50 years have never had any damage inflicted by Customs inspectors.
Anything of value about $80-$100 or more, I register and/or insure. I always demand that the seller state the correct value of the package contents and include an invoice.
A couple of times the Customs has notified me that an item has been selected for internal inspection, and I have notified them of the nature of the goods along with permission.