Are the eggs pure or hybrids?
They should be pure. Here is a link to one of the seller's same auctions, only mine was for 6+ eggs rather than one. Seller claims that they're pure.

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Are the eggs pure or hybrids?
Yeah, three look pretty similar... That's what I'm worried about. The top row is pretty dark and LARGE in comparison.Mine are very lite ,like the middle front one
All of mine (and pics I have seen) look the color of the middle bottom. The breed, even older ones, don't lay x large eggs. I am slightly concerned as I emailed the guy you purchased them from to feel him out. Just asked questions on his current egg listing. He is not npip so he shipped you those eggs illegally. Also he claims he doesn't have any paperwork to prove he got the birds from GFF as he want planning on breeding them when he purchased them. I don't know about you but if I make a $3000. purchase I am keeping the receipt/ documentation! Also he sent me a nasty email after that one saying well don't bid on his eggs then of I don't like it. Sure hoping they are all pure and just have a fluke egg color/size. Most of his + ratings are from items he bought not sold so is a very new seller on eBay. Hope some of this is helpful