Intro: De-soldering: Salvaging Components From Electronics.
There are many ways to do this, in this video I demonstrate two of those ways. If you are going to use the torch/heat-gun method don't breathe the smoke, it is nasty stuff. Even desoldering with an iron it still isn't good for you. Feel free to butcher some components learning how to do this, if you mess up a few it isn't like the attempt cost you anything so no big loss.