I just started playing this and I don’t know if it matters who you sell things to for example do I get more bits by selling alcohol to the bartender or the general store person or does it not matter.
I think (but I am not sure) you are right. The in-game explanation what "the merchant" skill is, is a bit confusing imo. On the other hand, your reputation really matters when it comes to buying from vendors. I am trying to get Gladys lower the prices so I am running the errands for Groundbreaker crew because ~5 K for the Salvager's Helper is a bit to rich for my blood.