IIRC the giant flats of Costco eggs went up to 3-4x their former price over the last year or so. Still a great deal, they're just not "holy shit that's practically free!" like before.
Weird. Eggs by the dozen (along with onions, one of the most volatile staples at the grocery store) are up only like 75% for me. Admittedly that's a lot and more than I had expected when I went and checked but I'm still seeing very different numbers.
I'm not sure other eggs are up as much as those large-flat Costco ones (60 eggs? Something like that). I have a feeling they were losing money on them before, they were so cheap.