I don't do much by way of collecting pipes. Many are bought new, and I'm never shopping pedigree. But over the years, I've ended up with a number of pipes you can no longer easily get, though most of these are fine smokers. So their reduced availability gives them a certain history and even desirability they didn't have before. In the category, for examples, I have the Danish factory pipe, a Bari, that looks great after forty years and smokes better; several of the recently discontinued BC pipes that are so well produced and have such good design in the best French style; and three Benton pipes stamped as Iwan Ries pipes made of oil cured Algerian briar. I also have an old screw-in stem stinger Kaywoodie Drinkless Ruff-Tone and a Yello-Bole Checker (if it is still made, it is hard to find). Funny the way history sneaks up on pipes. Have any of your pipes become more rare behind your back, as it were?