How much is a bottle of cheap champeign?!
Answers: $8 US will get you a decent bottle. Anything less isn't going to be champagne. Now a bottle of the real stuff - from France's Champagne will run you $100US or more.
A good and cheaper alternative to champaign is sparkling wine, specifically Martini & Rossi Asti Spumante. It's not champaign but it's decent and it has the bubblies.
Cook's Brutt or Grand Reserve is $5.99 and taste great, i buy it at Publix. I actually think it tastes better then White Star which costs $39.00