This is a much bigger issue with mods that have lower tariffs, but the behavior can be seen in the game. Basically, when you sell a ton of goods to a market that doesn't really have high demand for something, the price gets lowered significantly. However, by saving/reloading, the price gets reset.
Easy way to view it: Take an honest trader easy start. Buy a bunch of metals from Jangala. Sell ~75% of them to Ashiru. The price drops from ~25 to ~12. Save and reload. The price will be back to ~25 on Ashiru.
I don't know if there are any goods you can abuse this with, but you might be able to abuse shortages a little harder with this bug. It's certainly abusable in Project Ironclads.
