I noticed a nice looking 5-key flute, in Delrin, by Francois Baubet, on eBay that just closed without any bids at 840 Euros! I have nothing to do with this sale, but it seemed like a nice flute at a great price for someone. Fortunately, it just got relisted here: Baubet flute link
I have nothing to do too with this sale but I know the seller and I’ve played this flute once, it’s a really good one at a really great price. And there’s a block to add the 6th key.
Baubets are indeed nice flutes. Granted, I haven’t played a great deal on other people’s flutes, and only have substantial experience with ones I’ve owned, but I love my Delrin Baubet.
I love my 5 key delrin Baubet.