Insurance is added. We've recently (and will continue) to meet with UPS, etc to review rates. As others have mentioned, rates are up across the board. We don't set them, but we do fuss about them, too!
You also mentioned (in another post) bundling packaging. We spend a great deal of time, designing our packing modules. It would be impossible to slip a grapnel withing a Goonies set or a Bat-Radio within a Grapnel Box, etc. The smallest item we have is the JP map.
As per those modules. Here's a quick look at a few. Everything gets foam bumpers, thick corrugate and a little extra attention at go time when it ships from us. Even our warehouse is environmentally controlled.
Doin' what we can!