So broken off of something or another for the copper inside?
If it was, they took the wrong stuff. There probably wasn't ten pounds of stranded wire, 12-18ga.. The power supplies start at about $30 each (off brand, a Mean Well would probably be over $50). Not a ton of money involved in what is shown, but having extra power supplies is always useful.
Now that I think about it, it may have come from a led lighting system, also--anything that takes DC power and some control.
I'm guessing it was scrapped equipment of some sort.