i'd bet that Chrysler loses money on every Viper they sell. there really is nothing practical about a Viper, but it is a flagship model like the Corvette is to Chevrolet. but it doesn't get 25mpg like the ZO6 Corvette that goes just as fast and costs much less.
but, worry not- the Challenger will be out pretty soon. i'd bet they are getting rid of the Viper so people will buy the overpriced and overweight Challenger.