Looking at the galaxy map I turned on the trade goods and compared the routes to another system. I painstakingly removed each class of good until I found a route and then finally a good that was moving in the direction I was going (personal weapons).
I searched for personal weapons and they were not available on the exchange. I then went to the system map and clicked on every station that wasn't private and looked for exports - none exported personal weapons. In fact the majority of them listed that as an illegal good. As I understand you cannot buy from black markets (and I tried and no you cant).
What gives? How can the galactic map clearly show an arrow going from point a to point b with good G and then that good is not available for sale anywhere in the system?