My husband and I had lunch at Pierre Gagnaire and I think it was about $550 or $600. L'Oustau de Bauminere was $550ish for three.
We've had lots of meals in the $300-to-$400-for-two range. When traveling to a good restaurant area, we often book a few of these for the same week. I save the menus and have many framed and hanging in the eating area of the kitchen.