As a lot people know one of the common mistakes of new (and old!) players is to get stuck without fuel. As shipper trying to refuel away from the core systems usually means you have to go back to a core system to refuel which takes a fair bit of time.
The problem with trying to list fuel on the LM is not only players may have a full cargo, preventing them from picking up the fuel in the first place, but when I was running a refuel station in Centrality, players would accept all of them defeating the purpose.
I would be great if there was some time of planetary project that allowed players to buy/sell fuel directly to their fuel tanks, like a gas station. A micro CX if you will.