Some people toss their magazines after they read them, or recycle them. I resell back issues of magazines on eBay to people who collect them or are interested in them.

I also have never paid for a box to ship the magazines in. Used boxes that are of an appropriate size work great. Ones that are too big work to make shipping envelopes rigid to protect the magazines during shipping. Also, I use plastic grocery bags to make the packaging more water-resistant.

And a lot of my customers are happy with how carefully I pack their items! What's more, I give some materials one more use before they're recycled.