I don't think it's all about the bird flu, some mark ups are definitely greed. Today I was at a target, eggs priced 9 dollars for a dozen low quality eggs. Ralph's (West Coast Kroger's) priced them at 9 also. However, a day ago I was also at a Sprouts and a Trader Joe's, and the going rates were 4 dollars (although TJ was sold out). Hell, Sprout's much tastier Pasture raised eggs were like, 8 bucks, although those birds are likely the least likely to get infected.
The thing that killed me is at Target in saw a very ill informed woman buying two 18 packs of crap white eggs for what I can only imagine cost her a second mortgage. Please shop responsibly, y'all.