I've probably seen three or four over the years. At the time they were introduced, they were considered an economy class way to get a Colt revolver, like the Agent, which also had the "parkerised" finish (didn't need polishing or blueing, cheaper to make). I don't think I'd pay $595 for one, unless I needed it to fill a hole in a collection. Now if you come across a Viper or Boa, those are pretty unusual. - dan