What are the expensive eggs called?

I'm curious, could you please elaborate on the topic of expensive eggs? Are we referring to a specific type of egg that commands a higher price due to its unique qualities, or perhaps a term used to describe eggs that have been priced unusually high for some reason? Additionally, I'm interested to know if these expensive eggs have a particular name that is commonly used in the culinary world or among consumers. Could you please provide more context and insight into this intriguing topic?