Ideas for bringing back the black market

[pcw27]

I was never entirely sure how black market food worked originally but I remember once the illicit food we bought turned out to have been subtracted from one of our own regions. Regardless there are plenty of options for a new system.

My first thought is simply make a check box for all buy and sell offers that will make its source hidden. These deals are restricted by range just like regular trade, so the trader will have an edge in black market dealings and will possibly be able to use that to get a sense of where the illegal sales are coming from.

I haven't been a banker in a while so I don't know if the job gives you enough information to be able to figure out if such black market dealing was going on. If not perhaps some sort of investigatory ability can be added. If the banker in fact gets so much information such deals are obvious perhaps there are other measures that can make black market dealing more secretive.