Yeah they sell them by the case at Costcos. My girlfriend will go on some weird cake baking mission for different events and buy a whole case of them since that's where we get most of our food.
Then she only uses about 4 egg whites. I tell her just use regular eggs and I'll eat the yolks, but alas her cake baking frenzy can't wait for my yolk eating.
I might look and see what price they are
If their comparable to whole eggs I might buy some, but if they're more expensive, screw'um (I'm still buying my 5 dozen)