If you aren’t a frequent Champagne drinker, you won’t be able to tell the difference between that and a $50 bottle.
Below $50, there is a marked difference so I wouldn’t go any lower.
Note: In countries outside the USA (and in some cases within the USA), Champagne is labelled “Brut.” This is due to a worldwide agreement, which the USA is not a party to, that “Champagne” can only be applied to sparkling wines from grapes from the Champagne region of France.
I would pocket the $100 and go maybe $90.
Uh, 'Brut' means 'dry'. Specifically, fewer than 12 grams of sugar per liter. 'Extra Brut' is dryer still, fewer than 6 grams of sugar per liter.
That said, when celebrating the victory of good over evil, I recommend (to the original poster) Pol Roger - Churchill's favorite (or Ruinart Rosé, one of my favorites).
I know what you’re trying to say, but no. In America it’s labeled sparkling wine. Brut means dry, which describes the sparkling wine. Sparkling wine can be adjectiveless which is sweet, brut which is dry, or extra brut which is very dry.