One of my principles is to first try to repair before replace. I try to fix things and not just throw parts out. “If your Shifters don’t shift, I’ll try to fix them before selling you a new pair to install. That saves you money and keeps them out of land fill. I try to repurpose or recycle as much as possible. Tubes make for great ties to hold pedal & cranksets. Spokes can be turned into small Poking tools or rings to hold small part sets like brakes together. Shipping, I use paper for packing, or reuse bubble wrap”. I carry new and used parts and bikes. One persons donation is another’s salvation. If parts are defective beyond use they go in the metal or other recycling container if possible.