From the time I was very young, whenever any appliance or mechanical object was going to be thrown away, I took it apart and saved all the parts that I could. For instance, when my mother's reel-to-reel tape recorder that she'd had since high school stopped working, my sister and I bought her a more modern one, but which still used the same reels. I took apart the old recorder, saving springs, bolts, screws, spacer posts, the power cord, etc. Thirty years later, I needed a specific bolt with an uncommon thread. The one I found and used I recognized as being from that tape recorder. I also have old-time punched nails that I inherited when my grandfather died.