While not quite to the level of welding a brake lever I have a soft spot for Suntour RD/FDs that I find in co-op and used bike shop bins/drawers/piles. I can't stand to see these little engineering jewels all dirty and grimy, getting beat up, etc. I've about raided all the places here for the low hanging fruit, I do however have a couple shops I haven't yet gotten to. My last big daily haul from a couple places a few months ago looked like this (below) after a marathon evening of disassembly, cleaning, lubing, etc. Most of these bits find homes with other BFers. Those who have gotten RDs from me know what they look like when I'm done.

I agree with CMC's Grandpa, "Use it up, Wear it out, Make it do, Or do without..... " Most of these bits though aren't close to their useful lifespan and simply need to be rescued and gotten into the hand of folks who will care for them.