Could we have market open from SOR for few non players (extragalactical traders?) and then open it to all after 1 week of round?
Those traders “from distant Veddek Galaxy” could try to rip off MW a bit, but would provide some extra ress and gc for those who must have them. Buying ress with 3-5 gc (food 0.03-0.05) and selling them with 25-50gc (food 0.25-0.5). Amounts would be limited and market could be bought off, for a while at least.
After market opens to MW (player) traders too, there could still be a non player element lurking in the background, possibly even keeping market prices reasonable, so octa or food(!) for 100gc would not be only offers.
Non player traders could sometimes offer even cheap ress or buy them with reasonable gc price. Like a small easter egg for those who are active in the market. Something balanced of course.