Yeah, there are some rather large and awesome minis out today that are about impossible to store. I have the Mumak from GW, and I mounted it on a board and keep it out in the open cuz there's no way it'll fit into a box. But... for minis that aren't quite so large but still rather big and awkward, you can find some plastic storage boxes at stores. I have a bunch of bobbin/thread storage boxes I use for ordinary sized minis, and some customizable/size ones for bigger pieces. With some foam sheets cut up to fit the bottom, they work pretty good so long as you don't shake up the boxes a lot. I used to have a bunch of old cardboard/foam rubber storage boxes from Grenadier, but those all disintegrated after a few years.....