In my novel, the fantasy world is a gold mine for arms dealers, governments and ordinary companies to sell their share of goods to the fantasy world. Being a military geek, I can list out a ton of weapons waiting to be sold to the other side of the portal but what about more ordinary items? What will they bring to the other world? How will the occupants in the other world react to this? Will they prefer guns to wands? Or will they just see radios as a stupid gimmick only?