It's been placed on the labels of a whole assortment of Champagne wannabe's, but the true liquid article comes from that small region in France. The process of double fermentation within the bottle is used by many other countries. What they don't have is the subtle expression that is the hallmark of French Champagne. Non-Vintage Champagnes are combinations of wines from different years while Vintage Champagne are made from the grapes of the harvest year printed on the label. Sparkling wines are the most delicate member of the wine family and they need a lot of TLC to ensure they remain stable over an extended period of time.
Price is dictated by two essential things.
How hard is the wine to make, and 2. Usually the two things are a direct result of each other. Champagne is hard to make and the process yields a small amount of product to sell. Bad news for those expecting expensive wine for a low price. Skin contact determines colour and if the producer allows the red skins to remain in contact with the juice for a longer period of time a Rose Champagne is created.