I have had a few knives come to me wrapped by folks who weren't paying attention. Two of them were actually from custom knifemakers from the Knifemaker's section. $100+ custom fixed blade...sent to me in a bubble envelope. One arrived to me, the other didn't. The OP's post actually resonated with me for that reason. The knife I had lost was a total win for me, the right color, the right blade shape, the right materials, everything. Guy sends it to me in a bubble envelope, and of course I get an empty envelope. The seller DID refund me instantly, so I'm not going to call him names (truth be told, I don't even recall who it was, it's been a year or so) but I was pretty upset when it happened. My email was pretty firm in tone when reporting the loss, and he said that he hadn't had any issues before. Hopefully the guy is using a box now. I couldn't imagine spending time creating something beautiful only to have it lost due to a poor packing job.
When I send out items, I use a box with lots of tape and air-bubble padding. I don't screw around.
I still get a tear when thinking about it.....