In my neck of the woods, I’ve seen way more blued guns than nickel. In fact, I can recall seeing only one 2-1/2” nickel 19-3 and one -5. I’ve probably seen at least 10-times that many in blue, and I am not much on attending gun shows. Most of the blued 2-1/2” guns I have seen appear to have been cop guns. Pretty well worn. 
