You may learn, as I have, that salvaging parts from old discarded gear can be very useful. I have a house full of components of many types, including diodes, transistors, ICs, motors, fans, transformers, capacitors, fuses, on and on. I file them so that if I need something I can usually find it.
This has paid off for me over and over. Not only in saving money by already having what I need, but also saving time in searching for sources as well as being able to get on with the current project.
Of course, as in my case, one can carry it too far. One needs to realize that most people would think it's foolish but I don't much care what people think.