I thought I would talk about what to do with your old computer, or monitor or other electronics.
For computers, you can:
Take them to a reputable electronics recycler(one that doesnt ship them to China and dump them in a landfill),
Give them away; to friends, neighbors, kids or your favorite charity. They dont have to work; charities can use computers for vocational training(by teaching people how to assemble/disassemble them), or
Re-use the parts that can be re-used; this way the next computer is cheaper!