Components can be expensive – especially things like knobs and buttons. I have quite a few things lying around that I should have thrown out ages ago. Instead of just throwing them away I decided to recycle them by removing the components that would be of most use. In order to do this you either need a desolder pump or a desoldering iron.
If like me you don’t have much patience then a desoldering iron is a great investment. Before I used one I was skeptical that they would be any good. But afterwards I was left wondering why I’d not bought one years ago