EV's are still relatively new and rare in the marketplace. Price is driven by demand, at least on the resale market. With EV's, newer vehicles have bigger batteries, and for the uninitiated, range anxiety is real. It takes a different mindset. Nobody wants to be stranded on the road with a dead battery. That takes experience. You can refill your ICE nearly anywhere...that is not true with an EV. But, the things will always retain some value as long as they work. Their resale price should never reach zero while they still function.
2011 535i x-drive GT, 2014 i3 BEV
Soon (hopefully!) A 2021 X5 45e will replace the above