Interesting widgets left on the road are one of my favorite things! I also have a lot broken electronics, mostly PC boards. I recently found a rebuild place on line who will buy them. So they are valuable ,who knew?As a kid, stamps, postcards, dead insects, stones, interesting widgets left on the road.
Now, coins/notes, books (don't let me near a bookshop, I buy more than I can read) and broken electronics that one day I hope to either fix or salvage parts from.