I recently bought Buffy season 4 and Astro City volume 2 (comic book) from overstock.com. It was shipped to me in a box that was only about 5 cm deep. In fact, it was more of a rectangular cardboard tube. It was closed foldign the ends in, not any sort of convenient flaps. The problem was it was a roughly 4.5 cm DVD set paired with a 1 cm thick book. Add that the shipping container wasn't particularly sturdy and you end up with a crushed set of DVDs. The cardboard sleeve was horribly creased and looked pretty bad.