I wrote a letter to a casino in a small town in France asking if it was possible to purchase an obsolete chip or two for my collection, though not knowing that it had closed several years ago... and it happened to wind up in the town mayor's office since the mail carrier was unsure what to do with my letter; per the mayor, explained in note within the wooden cheese crate I received about a month later... Yep...!!! You guessed; total freaking treasure; not only from the closed casino in town, but also from neighboring towns' casinos of which some had closed 20, 30 and 70 years earlier... I was lucky...