Like I already mentioned in Discord I am supportive of the idea but I fully agree with Skorak's note that this could be really confusing for new players (and also make them lose both the money and the cargo they mistakenly bought, not realising why).
In that case I would actually prefer for the player to have to type the /sell command to sell stuff (I think it's better UX for the commands to be worded through the player's point of view, that is, what the player wants to do).
I also stand by my original comment that this is mostly convenience for the POB owners while the players are the ones who interact with the POBs in much greater numbers.
Having said that, thank you for your hard work in looking into ways to make the POB economy interesting!
