If you experience odd or unexplained amounts of merchant gold, even after the merchant has restocked, then you probably have another mod loaded after Trade & Barter which has altered the VenderGold leveled lists. To resolve the issue either: 1) Change the load order, and make sure that Trade & Barter loads after the other mod, or 2) Click the "Disable Merchant Gold Options" option from the menu. This will reset the Merchant Gold options and allow the changes from the other mod to prevail without further interference from Trade & Barter.
Dr Steinbock is an internationally recognized expert of the multipolar world. He focuses on international business, international relations, investment and risk among all major advanced economies and large emerging economies. In addition to advisory activities (www.differencegroup.net), he is affiliated with India China and America Institute (USA), Shanghai Institutes for International Studies (China) and EU Center (Singapore). For more, please see http://www.differencegroup.net/. Research Director of International Business at India China and America Institute (USA) and Visiting Fellow at Shanghai Institutes for International Studies (China) and the EU Center (Singapore). 

The same thing holds true of all other possessions; for barter, in general, had its original beginning in nature, some men having a surplus, others too little of what was necessary for them: hence it is evident, that the selling provisions for money is not according to the natural use of things; for they were obliged to use barter for those things which they wanted; but it is plain that barter could have no place in the first, that is to say, in family society; but must have begun when the number of those who composed the community was enlarged: for the first of these had all things in common; but when they came to be separated they were obliged to exchange with each other many different things which both parties wanted.