Using a Knobkerrie as a walking stick

Q: I have a friend who walks with a stick. He told me it is sunnah to use a stick. The stick he uses is a knobkerrie. 

Learning this I also bought the same stick, because I liked how it looked. I bought it from a traditional Zulu store as that is the most common place to find that type of stick. 

Recently I was concerned if the stick had any religious connotations within the Zulu kingdom. I researched it on Google and found that it symbolises leadership amongst Zulu clans etc and is also a symbol of manhood and was used as a weapon in old ages. 

Is it okay to continue using the stick for walking or does it count as imitating another nation?

Buying a closed box whose contents are unknown

Q: I would like to know if buying a box with the contents being unknown permissible or not. Example there are 5 closed boxes you cannot open before buying but the estimated value is R100 each. It can be worth more, it can be less. If the estimated value is R100 and it's on an auction platform, the bid can land upto R800 example or can cost you R100. 

Is this permissible to buy? 

Please note that each box will have something and none will be empty but it can be something with very low value.