Yeah, estate pipes aren't just from estates of the deceased, but are any pipe previously owned and smoked (unless old but unsmoked as noted in post above). Estate was a dignified way of saying "used," a good marketing ploy to evade the issue of someone else having used the pipe. Similar to the term "pre-owned" at car lots. I joke that many of the pipes I bought new are now estate pipes, throughly used. One-owner estate pipes. Several of the online retailers invite pipe smokers to send in their used pipes for cash or store credit, for resale. They do not require that you then promptly die. So an estate pipe is just a used pipe.