Benedict wanted me to sell a looted laser cannon to the weapons station in Eridani to satisfy the 'sell tutorial thing'. Unfortunately the weapons station was "not interested in buying more laser cannons." Returning to the Sisters of Domina station still had Benedict saying I should sell the weapon there. There was a second weapons station in the system but it also was "not interested". There was no obvious solution to this.

I got around it by selling the laser cannon to Starton Eridani which satsified Benedict (fortunately the starton didn't have enough in stock to also refuse to buy it). But new players won't know about this.

ferdinand 17 Jan 2018:

Perhaps it is better for Benedict to say something like "There might be some stations that want to buy the laser cannon in your hold, go and sell it for the best price"
That way the player also finds out that he can sell items in several places and that the prices might differ.