[BillyCoxDodgers3B]

People will say Registered Mail, I'm sure, but what you have is so voluminous.

Have you looked into Brinks or something similar for the valuable material? I'm not sure if they do overseas material or not.

For the lesser-valued material, I'd tend to go with Registered if it was me.

I would not be comfortable in having the good stuff in the cargo hold of a commercial aircraft in case of any issues and get the feeling you share in that queasiness. I would want as few people handling my collection as possible. Wouldn't want to deal with luggage being misdirected or tampered with.