playstation 1 and 2
The walkman is dead because the ipod came out and does the same thing as the walkman but with memory and ability to hold more music and its smaller. People tend to use the newest technology.
The electronics used to make the Walkman were found in 1970 in classified military electronics units and not any commercially available device as is common today. However, the original wasn't made much different or with any particularly different materials even then - gray plastic case, about the size of a medium size cordless phone today. Took 4 AA's to run, and it ate up batteries fast. To get rid of it you can recycle the plastic.