Wsasaire
Good starter on procuring electronics from tossed electronic –

The Electronic Peasant likes to get more enjoyment from DIY for less money, and sometimes uses obsolete parts as well. Salvaging old equipment can provide many important parts at little or no cost. And it’s environmentally friendly to save this stuff from going to the landfill!

The Electronic Peasant’s Guide to Fun and Profit with Electronic Salvage! Link.