Since DS9 is a sort of melting pot for the factions, why not add a cross-faction tech vendor? My thought was that this vendor could sell certain techs from each side to the other, perhaps new techs, or perhaps older stuff. My thought to make it work was a Ferengi trader or smuggler, but any third-party race would do. What do you guys think?
I know that the reward boxes for cross-faction techs are out there, but this opens up a new means of commerce for DS9.