I'm going to say all of this in a hypothetical sense so that no-one will be on to me.

By killing a merchant, would one gain all the items in the said merchant's store, assuming he/she survived, and had DM permission? Been doing some scheming I'm sure you can guess. Trust me, I'm not just gonna do this for the loot, If I do it at all. And If I do, there will be lots of plot stuff going on. With other PCs.

Bleargh. I'm loathe to give any sort of solid answer to this, but..

Possibly, maybe.

Rob PC merchants instead please.

"Maybe."

To increase your chances, I would definitely consider filling this out further with a DM. Generally, we put NPC merchants/stores with ever-lasting supply in the module for pretty specific purposes and to make available pretty specific things.

ExileStrife Generally, we put NPC merchants/stores with ever-lasting supply in the module for pretty specific purposes and to make available pretty specific things.

NPCs dislike full-looting as much as PCs. :(

If this goes down I'd personally like to see a concept application detailing what you plan to do with it, so I know what we're getting into supporting a PC taken over shop.