Can anyone please shed some light on how it seems to work? I know nothing is sure but is it:

Do the items retainers sell DO NOT appear on the market board if they are outside in the house? I was thinking this could prove useful to give access to the officers to gather funds for FC by making items FC members could buy at a cheaper price than MB to collect some funds. If they also appear on the market board it seems like a giant waste of resources. If the idea isn't that they DON'T sell on the market board can a dev please shed some light if an NPC like that could be made? Our idea is to make Xpots and stuff cheaper so that people in the FC can buy them instead of marketboard and still gather funds for airships and stuff.