It would be very nice to be able to sell cargo without leaving a sector in space. It could even be made a feature of some “mini stations” in every sector that you can “dock” to like on a Ze’Ta and open a “shop” menu that let’s you buy and sell things like ore and modules.
It would be an extremely simple addition and would make space feel more active and useful.
Maybe some stations could sell unique ammo and weapons and modules that you can only get by buying them there.
For instance mining sectors could sell mining equipment and ores. Scientific sectors could sell ship parts or modules etc.
I still am waiting for a mining laser that you fire at asteroids to spawn ores to pick up.