As an aside, I saw an advert on Ebay for fertile runner duck eggs, £1000 for six. Postage was free though !
Don't worry! They don't actually expect anyone to buy the eggs for that much!
As an experienced ebay seller (I make a living from it) I can tell you what they are doing:
They kept the listing from last year, and as the ducks are not laying atm they increased the price to discourage people from buying for now. When the ducks start laying again they will lower the price.
Older listing, with more people watching it, and many more views will get more clicks than new listings, once they lower the price.
You might as well start watching that one, you will get notification as soon as they change the price