Hugh, just go to the closest electronics recycling center if you have one. I just helped someone dispose of several (albeit bulky) monitors this way - there were even more like this just sitting there when we arrived.
Hmm, cool idea for a thread. I could contribute:
-RAM sticks from old IBM/HP desktops, might be 128, 256 or 512 mb sticks.
-RAM, CD and floppy bays from 2005ish thinkpad
-300-350 watt PSU, from stock 2009-2010 HPe desktop
Not sure how useful these parts are for anyone else, though I know getting an old replacement part can be hell.