A recent study by iSeeCars.com found that electric cars and plug-in hybrids have become some of the fastest-selling used cars. During the first eight months of 2017, six alternative-fuel cars were among the top ten quickest to sell of all one- to three-year old used cars. Three of those models were electric (Fiat 500e, Nissan Leaf, and Tesla Model S), and three were plug-in hybrids (BMW i3, Toyota Plug-in Hybrid, Ford Fusion Energi). Many of these models also saw fairly significant price drops from the year before.