I believe it's still cheaper to buy whole eggs and separate them yourself.
Truth. Much cheaper. HOWEVER, you have to use so many eggs to get the same white, that it may be a wash. Never done the math tho.
Not nearly as convient, however, if you ever want to have some yolks, you got em too.
Egg whites are just convenient, but IMO its not worth the extra cost. To each his own I guess.
I tried the egg white from costco for a while, if I was going to do it again, itd be costcos.
The other ones are just overpriced doucherie, as A23 said.