Merchant Archive

I've got four vendors, and they give me about 10K Merchant XP per day. I sell very few items in them too, mostly a few house deeds to people who don't have cash on-hand or who are factioned.

All my vendors are NPCs, so they only cost me 25 credits per day, even when I sell expensive house deeds in them.

I also have Advertising III so that one of my vendors is on the Planetary Map. But even though I get the message that the maintenance has been increased, my vendor is still just 25 credits per day.