It happens if your at the right place at the right time!
I was working for Washington State University grounds shop a number of years back, and happened to be mowing the track in-field when the old skylight windows on the field house were being replaced with new and high tech Pella panels.
As I mowed my way around the in field, I, being a scroundger of things copper or lead, saw what looked like a pile of lead in the contractor area.
There happened to be one of the contractors on the ground at that time, and I ask him if the "stuff" was what I thought it was.
He ask what I thought it was, to which I answered, "lead."
It was, and I ask if anyone had spoken for it, nothing ventured, nothing gained I guess, and his reply was, "take all you want, eat all you take."
The lead was wrapped around "Tee" steel bars in which the glass had been seated.
A friend and I hauled off the lead/steel over the next few days, and it turned out to be over 5 tons of dirty but almost pure lead.
The scrap value was so low that it was not worth the contractor's time to haul the lead and steel the 40 - 45 miles to the nearest scrap dealer, so they were glad to get rid of the waste material.
We stripped the lead off the steel and my friend found a fellow in the process of building a fence to buy the tee steel
The lead was sold here and there, a dump truck load went to a Montana boolit maker and I guess my friend still has some stashed away.
Pays to keep your eyes open!
Keep em coming!
Crusty Deary Ol'Coot