Source: https://insideevs.com/monthly-plug-in-sales-scorecard/ Prius Prime - appears to be a popular plug-in hybrid even though SouthEast and Midwest Toyota won't sell them! No advertising along with limited availability. Model X/S - are trending upwards but they are 2-4x the cost of a Prius Prime. Not bad for cars like the Prius Prime are not advertised and can't be bought in some states. Bob Wilson