What Is Something That Surprised You That People Can Make Money From?

For me, it was selling overpriced candles. I knew an influencer who made candles herself and sold them for five times the price you would pay for a candle in any store. She was doing this only through Instagram and her low-effort WordPress website. She sold them for women mostly.
Another thing was a woman who bought clothes from China and organized live streams on TikTok, showing the clothes and sometimes trying them on. I was surprised that people bought that stuff, and in about two minutes, someone would message her in the chat wanting to buy it.
I always associated business with being difficult – you have to have a niche, and it should be innovative and creative. But sometimes, I witness people making money from things that seem ridiculous, and it makes me realize that some people are willing to buy almost anything. I didn't expect the demand to be so huge.
What are some business ideas that surprised you, where people actually pay money for them?
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