http://www.thv11.com/news/story.aspx?storyid=251982
No, they didn't steal the actual railcars (it would be the silliest chase ever, as the tracks might suggest)
Just the copper wiring, $5.5 million worth from 22 railcars.
Porsche ain't got nothin on a railcar.
My guess is around $5/pound copper where things start getting ugly, at anything above $10 and society might start to implode as people might start going after active power lines.