The sale of online used textbooks with many suppliers and the low cost of switching to a different supplier is an example of Customers having a lot of power.
It is essentially the consumer's ability to make purchases at their disposal. Generally, the higher the consumer's income, the higher the purchasing power.
Consumers have always had the ability to vote with their feet and wallets, but now they have the power to influence not only what they buy, but what others buy With the help of social media and digital devices, consumers are deciding when, where, and how they interact with brands.
Learn more about Customers having a lot of power here: https://brainly.com/question/24553900
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