Everything that runs on electricity or utilizes a signal has a circuit. Maybe not a circuit board, but it most definitely has a circuit. Otherwise no electricity would flow. As far as the definition of electronics,
here you go.
All items sold on a public market will react in totally different ways. Depending on manufacturing costs, supply and demand, selling price, etc, these items will sell for different prices at different times while still on the market. One generalization can't cover all devices.