ha, thanx for the into kuger. JPD, nice find. Thanx for posting. Those are not found too often back east. They're most often found on the west coast (CA, OR, and WA). They've taken on a sort of "metal detecting lore" amongst hunters here, d/t their known arrival time of late 1810's-ish (or maybe early 1820s). So whenever they turn up, you can know there's potential for reales, etc... Some have even been known to fetch a few hundred dollars, but lately, the market seems to be back-down.
The reason there's a market for them (at least the market I've seen, in most of the ones I've sold), is they were popularized by a book that came out in the mid 1960s: Stone Age on the Columbia River. That book dealt with indian history of the Columbia river area, yet had a chapter dedicated to contact era indian trade goods. Mind you, indian artifact hunting had gone on in the area, since as early as the turn-of-the-century (not unlike indian artifact buffs, even to this day in various regions). Well that chapter was popular amongst diggers and relic hunters of that period (1960s/70s), because there were already persons in the area, who had handfuls of them from the decades leading up to them (people sifting for them, etc...). As soon as the history of this particular button got a good-writeup of history, buffs in the area took it as sort of a 'bingo game' of sorts, to get all the different #s, sizes, and so forth. So to this day, there are still indian artifact buffs there, who sometimes bid them up. Also anyone who's into the history of the former French colony of Haiti (where these buttons were meant to outfit the army that was to have put down a rebellion there) have been known to bid on them. Apparently this was no small episode in European colonial history of the new world, specifically this colony of France.
Anyhow, in the interest of space, (so I don't get writer's cramp), do this: go the main page of T'net. You will see a tab "advanced search". Once there, do a search on phoenix button with quotes around it ("phoenix button"). Choose the option of "any date". Then you will get hits going way-back-to-whenever on T'net, where this subject has come up. You can see where else they've been found, and you can see more detailed writeups I, and others, have given on them.
If you don't mind, I'm forwarding this link to a certain collector/author in the Pac. Northwest. He is working on new book on indian trade artifacts. He's keeping a mental picture on their distribution back east (ie.; what other states they're found in), as possible clues to their arrival and subsequent distribution in the USA.