Just FYI, Ethgreze has been in boom state for about a week (haven't looked today). One feature of it was 2 new zones called 'seeking luxuries' around one planet, which each contained three T9s and some light fighter escorts. Flying close to one of them (~200-500m) with the correct cargo on board automatically empties your hold of things they are looking for. One thing they are looking for in Ethgreze is performance enhancers, and they paid the high demand price. It is not clear what else they want, though it may help to cargo scan them to find out what they are already carrying.
Not all of these T9s are from the same local or major faction. Sometimes I come across dirty Federals trying to muscle in, though there are no Federal factions locally, sometimes Fed T9s with wanted status, sometimes fighting the other T9s. So I speculate it may be useful to look at which faction the T9s belong to before approaching them too closely, if you only want to push a particular faction. Obviously shoot up the T9s that are wanted and not of your favoured faction, if you have the fire power, without rep penalty.