Selling technique

When I was doing my weekly shopping in our nearest town of Kandi last
Saturday, I was approached by two young men. By their over-polite
greetings, I could tell they wanted something, and sure enough one of
them soon launched into his sales patter.

Him: We're selling traditional medicine. It can help with all kinds of
diseases (and along came a list of examples...).
Me: Thank you, but I'm in very good health.
Him: It can also protect you against witchcraft. Do you know witchcraft?
Me: Yes, but I'm protected by Jesus.

And they gave up (convinced by my argument?). I obviously didn't want to
help them with their sales technique, but I felt they were hardly
pitching to their audience. Generally speaking, any white person around
here would either not believe in the power of witchcraft, or would, like
me, know that they have nothing to fear from it. If I'd wanted to help
them, I'd have suggested forgetting the supernatural, and insisting on
the natural, organic ingredients and cleansing, preventive powers of
their products ... well, it still wouldn't have worked on me, and there
are very few whites about, so maybe they should stick to their "one
script" approach ...