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Most expensive computer keyboards. First in the list is Happy Hacking Keyboard Professional HP Japan. A keyboard coated with the Japanese lacquer known as Urushi using a special brush made from the hairs of virgins, and then powdered with gold dust! The keyboard can be bought at a whooping price $ 4500 approximately.
The three main mouse device types are: 1  Mechanical: Built with a trackball underneath the mouse and mechanical sensors, allowing easy movement in all directions. 2  Optomechanical: Similar to the mechanical type but uses optical, rather than mechanical, sensors to detect trackball movement.  Optical: The most expensive.