Brooch Bouquet

After listening to the most recent Scavenger Life episode, which touched on scrap metal/jewelry lots , I got to thinking about that junk jewelry I see ALL the time.

Sold Junk Jewelry Lot Listings

So other than identifying the valuable metals, gemstones, and Bakelite, I'm wondering how do I make money off junk jewelry?

Google Shopping Brooch Bouquet

eBay Sold Listings "Brooch Bouquet Lot"

Etsy Brooch Bouquets for Sale

I'm not going to start making these, 

but I'll keep my eye out for cheap lots of junk jewelry now!

I'd never even heard about this trend. What about you?