I love scavenging!
As a kid, I lived on a dirt road traveled by grove trucks and I found assorted tools buried in the dirt. Once I found a diamond ring that I thought was a fake and, being a kid, lost it. Some years later, I realized that the rather sizable diamond had cut the glass on my Dads car window when I tested it, plus it was a solid band, not a split, one size fits all kids band.
I reluctantly realized the I had pitched a real diamond into the woods, which by this time had a house directly where I think the ring landed.
I found the working part of a single shot rifle that still worked, and abandoned house hidden in the woods with medical textbooks in it, that I took.
Once I picked up a couple of old 1960s grade school desks someone was pitching out, later I found nearly new kitchen cabinets someone had tossed, but my Dad, who was a postman, got one of our greatest treasures; three single drawer desks and matching Oaken chairs that were being tossed out at the summer home of the Dodgers, Vero Beach, Florida. They had been in the barracks from when the place was first built, all of those years ago and had originally come from the Naval base that had been there during WW2.
I’m using one now for a computer desk. 
In another abandoned house, where half of the roof had fallen in, I fished out a bunch of over the counter medicine bottles, all still containing original medicines and all dated back to the 60s. I would have gotten some intact book cases, but they were holding part of the roof up. I still have them.
In a pile of books pitched out at a dump I got one old book that just turned 100 years old this year and another about Panama that was printed around 1910 on real linen paper.
I know there’s more, 'cause I’ve been a salvager for ages, but I can’t recall right now.