I don't have a cue how I would package them to sell them. Counting them would be a nightmare for me, a little easier with your larger ones but I wouldn't try to get a specific number. As for shipping, my best guess would be to use a medium sized container with larger pieces of charcoal and some water in there with a small amount of food. The larger pieces won't kill as many in shipping from what I have read. For selling without shipping, some charcoal in a medium container and some water with a good lid on it. I would cut the lid and hot glue some fine mesh on top for air.

I would really have to research it before I tried selling them really but that is my best guess with the limited information I have found online about shipping them and packaging them.