The public’s interest in hybrid vehicles has declined significantly lately. According to Kelly Blue Book, “The hybrid market is in a free fall.”. After interest in hybrids listed on Kelly’s sites fell by more than half during the month, the company began warning dealers not to add those models to their inventories. General Motors has said that sales of itshybrid SUVs and pick-up trucks are now mostly confined to businesses that “have some sort of ‘greenvehicle’ commitment or mandate”. Why has this happened? Well, the most obvious answervis that the price of gasoline has declined of late and when that happens interest in hybrids typically also falls.