Yes that must be it. (I will try that asap since I have uninstalled the game in a fit of rage.) I have re-read that part multiple times but somehow interpreted it like "Don't install the Best Buy Locator, just the Best Sell Locator".Best Selling Price Locator (optional: no shopping, but sales)
So I strongly suggest Lucike edit that part to;
Best Selling Price Locator (optional: trader will only sell wares in cargo hold, and will not purchase any products)
Apologies for my "creative English interpretation", I'm amazed nobody else misinterpreted that.
Thanks for the helpful responses everyone!