I am rather well informed, I'd say : I was speaking in terms of taste and flavour.
But a 20 years old bottle of Piper Heidsieck will cost a lot more than a bottle of a recent vintage : what you buy there is no more the champagne itself, but its brand.
Edit
Hmm, and well... Without trying to be racist towards ya americans : do not believe too much in yourself when you speak about stuff that others produce, hehe.