There's something to the connection between evil and the word Sith beyond Star Wars.
Here's proof:
Definition, Synonyms, Translations of Baobhan sith by The Free Dictionary
www.thefreedictionary.com
Your'e off on that one. It was when I was a child I remember encountering them, getting a real good look at them. They wore a type of rag-like garb resembles burlap also silk. One of their favorite colors was a burnt orange, then in the red range, but varied.
They chose to each other and paired husband and wife. Their head gear was something like Muslim, but looser fold, only one or two layers. Their skin was almost a red at times, but depending upon the time of year, would darken or lighten like a humans would.
I guess their trading groups would number no more than six. They carried a purse and a money holdings, as you say manager. Then, personal weapons were commonly carried, because one could get robbed.
They would either throw a rug down with their wares, or if a table was available, they would use that. I can't remember the ships they used, but more than likely paid a percentage of their earning for a ride to some planets. I remember someone told me they would answer any question put to them, but never over-haggle a sale, didn't push.
There's something with the construction of a Sith that they could tolerate heat. Talking about a hundred twenty to thirty F, with no problem. This gave them access to planets that were too hot to do business on.
They were intelligent. You didn't want to piss one or a few of them off. But made great acquaintances, if you gained their trust and the befriending took place.
There were one or two of them that did extremely well, that were well off and had spaceships, plus nice places to live.
What you see as a Sith in Star Wars is a perversion. Not permitted by most of the Siths I knew. In more normal climes, they blended right in and no one even noticed them. I don't think that it's a good thing to hang a label on them that's not justified.