It turns out that, like most everything else, barbed wire shows up at auctions. Not just shiny new stuff, you’ll find used stuff too. Expect it to be at least a little rusty, and look out for clumps of hair or other things stuck to it. Whether that adds value or not is unclear.
Where could we look to find out? The Antique Barbed Wire Society‘s Barbed Wire Collector Magazine might be your best source. Twenty five bucks will get you a six issue subscription. Don’t think there’s that much to know about the stuff? Take a look at these bundles and think again.