Reading your parent comment and the responses, I feel be missing the point others are trying to make. There's much less technology, components, and material in a headphone compared to laptops. The circuitry in the headphones is closer in complexity to a charger than a laptop.
The cost of something doesn't always correlate with the technology, components, and material. A Hermes bag doesn't even have a single circuit in it compared to headphones and laptops. Yet it costs more.