It might be a good idea to question what we are calling trade. Axes for example may not have been anything like the trade goods that we commonly think of, it may be that the procurement of the axe may have been an integral part a the quest that took people across the country in an effort to appease the gods. I wonder exactly how much design variance there is with axes of a particular type, that might give some confirmation that they were many produced by a few, or more individually created.