*In the myconid colony after killing the dueregar despite Brew leading you to the treasure, it is still showing up as red and if Baelen notices he tries to stop you from stealing (it would also be helpful if Brew had his name listed over his head instead of restless myconid)
IS THAT WHY I COULDN'T FIND HIM? smh I just Misty Stepped in there so no one would see.
Also the merchants like you more if you sell them an item for less than what's it worth, I just give away all the vendor trash I can carry (cups plates etc) and then actually sell stuff once they reach 100. Also don't forget to use your highest CHA character for that (usually Wyll if your main isn't maxed in CHA).