I haven't really thought about it, just something I could use like ammo or bullets, military surplus? Not sure. I collect military firearms of all types. Right now, I could use a couple Finnish Mosin Nagant slings, preferably the canvas variety or even a leather one with the oval buckle. I could use a couple more AR15 magazines, 20 or 30 round. I like larger caliber dummy cartridges. ??