I work in a New Age store. You see all kinds in there. From people who want nice-smelling incense, to people who genuinely believe buying chunks of rose quartz and red candles with "Come to Me" emblazoned on them will make their soulmate appear.
I'll admit I don't know much about metaphysical stuff beyond the basics -I don't believe in most of what I sell, but I'm good at BS and have gotten by for nearly a year without yet memorizing which stones will make you rich or which stones will help with your kid's ADD.
So once in a while a customer comes in with "Advanced Knowledge" and I have to wing it until I look up whatever they were talking about, and it turns out to be an Actual Thing. Then I add it to my reluctant pool of metaphysical wisdom for the next time.
Take the Lady Who Hated the Number Four. She was your typical older hippie-sort, frizzy graying hair, billowing clothing, sandals, smelled mostly of patchouli. She purchased a windchime, two rocks, and and two packets of incense for her heart chakra.
Me: "That'll be twenty-two dollars and four cents, please."
Hippie Lady, who had been opening her wallet, froze, and abruptly shook her head.
Hippie Lady: "Nuh-uh. Ring it up again."
So I did.
Me: "Twenty-two dollars and four cents."
Hippie Lady smacked her palms on the table and stared at me.
Hippie Lady: "I'm not paying that. That's the number of death."
Me: "But it's twenty-two dollars..."
Hippie Lady: "How can your register even let that be a price?! I'm not paying that!"
Me: "Do you need to purchase everything at once? We could split the sale up, or you could buy another rock for a dollar--"
Hippie Lady: "NO. I HAVE TO BUY FIVE ITEMS TOGETHER."
Me: "...how about you make a dollar and change donation to the homeless cats fund? I'll just add it to the sale total."
Hippie Lady agreed to that idea, and all was well afterwards. I had no idea what she was on about with those numbers, until I googled "evil death number" and learned that apparently four, and combinations of numbers that equal four, is considered to be very unlucky in Feng Shui and five is a better number.
Since then, I have used this wisdom to impress a few other customers when four comes up in their total, and I convince them to buy an extra item to avoid the number of death.