Final answer:
Buying a used laptop computer at a garage sale is NOT an example of a business-to-consumer (B2C) transaction website.
Step-by-step explanation:
A business-to-consumer (B2C) transaction website refers to a website where businesses sell products or services directly to individual consumers. From the given options, buying a used laptop computer at a garage sale is NOT an example of a B2C transaction website because it involves a consumer purchasing a product from another individual rather than a business.