a filter system for Commodities Market
Well, I really don't know what to say... what will it bring to gameplay?
How about the "Wandering Merchant" who would sell a "materials and data" to improve modules at engineers?
Only one in the whole inhabited bubble (or just in the "Colonia" sector), staying in one system not more than 6 hours, after which he would jump in a random system at a distance of 300-500 l.e., and Yes, for this he will need a "Mega-ship".
The search for "Wandering Merchant" should encourage players to communicate.
It is also not excluded a some speculations ("-bring me a 10 cans of gold and I'll tell you where he is") and outright lies ("- I saw the Merchant was in sector..."(where he never was) and to the question: "- where is he? there's no one here!" get answer: "- looks like he already left!").