Hey guys, I'm not sure that the cardboard boxes are going to be practical to drop as they are fairly commoditized and most of their cost is in the shipping.
That said, we have an excellent relationship with the folks at Decktutor and you should definitely keep your eyes peeled for something from them on Massdrop. We'll let you know when it is coming.
Feel free to add more options! I've got a lot of sorting to do myself, and I'd really appreciate suggestions on which brands and sorting methods might be worth trying. I play MTG, but obviously this poll could be useful to other collectors as well. Thanks ^^