helloBarry, your proposed trip to South Africa- I live there and I
would not suggest that you wander around such places as the Bruma
flea market unaccompanied by a knowledgable person from the
area,there have been several nasty incidents there and the police
are spread too thinly to be much help, you would be immediately
recognised as a foreigner and probably carrying cash, Yardleys, which
is the good rock shop referred to in one of your query answers, has
been bought out and does not operate any more .As far as your search
for Tsumeb specimens is concerned you would do better by going
directly to the Tsumeb area, the mine as you probably know has been
for several years closed,if I can help you are welcome to contact me off
line regards Dave