When the re-engineered Viper arrived in the second quarter of 2013, the base price was more than $100,000. Some dealers tacked on market adjustments that boosted prices even higher.
Since April 2013, the Viper has averaged just 60 U.S. sales per month, according to the Automotive News Data Center. In August, dealers nationwide sold just 38 Vipers, down 38 percent from a year earlier.
On Sept. 1, dealers and Chrysler had more than 600 unsold Vipers in stock -- a 434-day supply -- and about one-third of those vehicles were unsold 2013 models.
Chrysler's Conner Avenue plant in Detroit, where the Viper is built, has worked just 10 days since April 14 and has been idled since July 3.
Given the slow sales, some dealers and outside observers have questioned whether the car that debuted in 1991 should be retired.