That’s cool! I have heard a lot of people that make flies are willing to pay a lot for certain kinds of feathers.
Pay a lot for certain feather is right.
Check out this eBay search:
Your suggestion made me curious so I found a forum for people who tie flies and I asked them about my birds. At first they sounded a bit discouraging but I may have found a few experts who are willing to experiment with my feathers.