Just look on eBay. It's full of used electronic shelf tags, sold in bulk -- usually, with prices still on them. :) The sellers don't know anything about how t

Just look on eBay. It's full of used electronic shelf tags, sold in bulk -- usually, with prices still on them. :) The sellers don't know anything about how they work so it will take some digging to find the right ones, but having to dig a bit is normal for eBay (or Aliexpress, for that matter).