Re: Missing merchant in Skyhold
Seggrit shows up in Skyhold and roams around (not as a merchant) if and only if you save him during the Haven evacuation.
You get two new merchants: Bonny Simms and the guy at the stand next to her.
A third merchant, opposite from Bonny Simms will sell items that give power + inquisition rep. He is dependent on a war table mission i think.
A fourth, bugged merchant near aforementioned power/rep vendor has no stall or npc, just a buy/sell prompt - I'm not sure what triggers this one to appear, or if he was there from the start. Might be dependent on Bonny Simms' trade route war table mission.