Youre also forgetting another component which is that the instrastructure gets torn down or stolen because it has market value. The replacement, maintenance, and security of wired grids is likely higher.
I was buying a 15ft strand and it was $18.
It's probably worth even less if you have to resell wire to recycling businesses of the "no questions about where you got it" variety. Are these wire rolls large enough to contain a thousand pounds of copper?