With scrap copper at $3, ...
...the jobsites around here are a lot cleaner than they used to be after the electrical contractors finish. You don't find even the odd half-inch piece of #12 lying around. Our company sparky does the odd job here and there on his own time, both commercial and residential, and manages to accumluate a couple hundred pounds of scrap every few months, and he's an honest guy.
We're putting up a small addition at work, and the supplier dropped off a pretty large bundle of copper pipe, from 1/2" up to 3" or 4". They put a guard on it until it was installed.