Diplite Resealable Comic Bags w/Board
Every book I sell comes bagged and boarded in standard bags. I don't use the expensive ones because I tape the books to the cardboard to protect them and the bags are going to get ruined anyway. Once you've extricated your books from the protective packaging, you'll need to re-bag them, and these are some of the best bags around. They're like Mylites but custom made by a collector who wanted them produced to his specifications. Crystal clear, sturdy, and perfectly sized for silver age boards, I use these for the expensive books.