Mox isn't meant to be hard to buy...they sell it on, Baltimore shipyard, Freeport-4, the Junker base in New Berlin (can't remember the name), a base in the Pennsylvania system, The Nonsense Factory...and quite a few others that I can't remember as of now (or have never seen)...not sure why they removed those sell points though :/
IT DOESN'T MATTER WHAT I SAID, IT MATTERS WHAT I MEANT!!!!
I requested switching around MOX and HazMat canisters.
Dortmund is a smelter that processes scrap metal and produces metal-based products - HazMat canisters.
Wuppertal is a refinery that processes toxic waste and produces chemical products - MOX.
It's intentional.
Since the unlawful sell point at Kreuzberg was removed, I suppose it could be added to Heisenberg to have a new sellpoint within the system of production, accessible to unlawfuls.
With cloaks soon being changed to using ammo based fuel - or so I heard? - it doesn't make much difference where it is sold anyway... and then I remembered that it is also used for base shield fuel.
So hm, I guess Heisenberg should also sell it. Really depends on what will be used as shield fuel (for bases) in the future though.
Jump drives and Scanners also still use MOX (or at least..MOX was the most efficient fuel to use them with). So, the demand isn't going away, even if cloaks start using a different fuel/ammo.
Indeed, it's totally annoying. It would be better if MOX is available in New Berlin and in Koeln. In return, the sellpoints in Koeln should be cheaper.