Those would definitely sell but I'm not sure if it works genetics, those genetics split into black, blue and splash when bred, I'm not sure if breed plays a part. Is it a real Ameracauna?
Stick to local cash selling, ebays fees are steadily growing and they're so quick to please the customer, they'll rip off you as a seller.
Many customers don't understand the logistics of incubation for shipped eggs.
That being said, colored eggers or splash whatever usually sell well.