Old Technology "Dump"

Is there such a thing as a "dump" for old technology? What do you do with your old technology? When I can, I get $ for old technology like cell phone trade ins :) T-Mobile has given me $200. for old cell phones on two separate occasions when I have gotten an upgrade. I noticed a box at Best Buy where you can "dump" small stuff inside the store but I don't really know where to take desktop computers when they are no longer any good to anyone. Last summer we took one to the landfill where they did have a special pile for electronics but I was thinking that there must be a better more earth friendly way to dispose of old technology. Another time we gave old monitors and a desktop to the Salvation Army. I think they have people that can restore them and then sell them but I'm not sure about that but that is what I've have done with things that we no longer want/need. If there are better ways to "dump" old technology, I think that they really should be better advertised.