I've got roughly 100 comics to sell, all bagged and boarded. They're 1990s stuff mostly. With tax and shipping for 100 Gemini mailers, it's $0.78 per comic. This is from just taping the comic down with painters tape and no cardboard sandwich. Now if I were to use a Kraft bubble mailer that's 9.5 x 14.5 with a cardboard sandwich it would be $0.73 per comic (tax and shipping for the materials). The sandwich is from 8.5"x11" precut 3/16" thick cardboard. What is the best way to go here? If I add in the "sandwich" to the Gemini it would increase the cost to $1.25 using Geminis. I don't have any cardboard around that I can get a hold of to cut my own pieces up, which is why I'd rather just order. I've seen people say that just taping the book into a Gemini can bend the comic while trying to remove it. I've also seen people say bubble mailers with cardboard inside aren't enough.