How many rare breeds do you have already? Excited for you with these eggs
I've got my Tufted Roman geese, which are also considered Critical by the Livestock Conservancy.
I've got the Aztecs, which very nearly went extinct and were down to just one known flock, but the breed is not well-known and was never widely recognized so that might not count.
I've got my Ko Shamos, which I'm not sure if we would consider rare, but they aren't well-known and I don't many people at all that keep them.
I've got the Ayam Ketawa, which are a bit rare in that they are a recent import to the country.
Brahmas are listed as Recovering now, but I would argue that good, well bred brahmas are still not all that common.