I recently shared a bottle of Duval Leroy champagne with a friend. Wine Spectator recently rated it a 93 on their 100 point scale as the top champagne this year in the value category (as opposed to the $300 bottle category).
I bought it at WholeFoods for $35. It was decent, easy to drink, dry and very effervescent. All in all, I was happy. However, I have to say that for character and an interesting taste, I actually prefer the $10 Charles de Fere blancs de blanc which I also saw at WholeFoods.
We pay an extra $25 for the words 'champagne' on the label. Now that is good marketing!