Boris
Old fat tired rider
I think the last one I sold I put in a flat rate padded envelope. I think those have gone up in price too, but at the time it was cheaper than anything else I could find.
This is the way to go!!!! I think it's something like $8 now. I've shipped two rear hubs in one with cogs and brake arms removed. They were well packed and arrived safe and sound. It wasn't a pretty package, but it didn't have to be. Thanks to @fxo550 for the how-to tip.