I really do not like the idea of Armor being in the market. It is hard for a reason. It is suppose to be a challenge to get them all. And also, these armoirs were end game armors when those maps were the last make while the game was in production. I can see making the dungeon easier to run on hard since they are no longer the end game dungeons, but to just out rite sell them in the marketplace....
IDK, I gives me a bad vibe. If they were skins only maybe. By some is could be seen as PTW and this game just starting to get a foothold and take off again, that label would drive people away.
I really do not have a good solution, but what about adding the id tag to the loot table of the bosses for the middle difficulty for those said dungeons? I know it is possible for other games, but IDK how this games engine differs from those that run on UE4 or Unity.