I've probably still got a couple of miles or rolled up ex railroad fence wire.
About a hundred yrs old and better than any new I've seen. Kinda a bronze sheen on it.
I use this for gates. I Never use any kind of new wire on gates---wants to curl up. And the last three feet or so, on top wire, loop end, I use barbless. Saves on shirtsleeves and owies.
Taking down RR fence, there's 3 screw on stays between every two posts---easiest way to get them off is 14" bolt cutters, you just need to cut one side. 20 bucks a set, I've made thousands of cuts with first pair and still as good as new. These are a MUST HAVE in fencing tools for me anymore! And if you ever get in a grass fire where you're cutting every corner you come too and getting outa the way---you'll send me a bottle for Christmas if you've bought a pair.