The last breakfast buffet I had, I think the buffet was cheaper than ordering a la carte. I'm not that big of a breakfast eater and the selection was limited so I think I only did three quarters of a plate.
However, it did have eggs benny. While I love eggs benny, it isn't as big of a draw for me in a buffet (ie. when the they have a bunch in a heating tray) because I find the yolk regularly ends up getting overcooked sitting there (I guess unless you time it right ).