A few harmoniflutes have been popping up on Ebay recently and some of them have been going for quite low prices. This one went for £56, for example.
This one seems to be a 'Charmoniflute' and went for £62.
This one, in less good condition, went for just £19.99.
This one is being auctioned at the moment. It's in excellent conditionally (visually).
Update: it sold for £60
And this one is also being auctioned at the moment, it's made by Busson (the famous flutina makers).
So, rescue a little piece of free-reed history today...