Top 10 New Vehicles that Languish on Dealer Lots, Fall 2017 Published on September 28, 2017 in Top 10 by Michel Deslauriers Photo: Chevrolet 6- Chevrolet SparkAs long as the price of gas is low in the United States, consumers will turn their backs on small cars. The Spark is nonetheless interesting, but it currently has an inventory of 175 days.