It is too early to tell, but since such a high percentage of the cost of an Electric Vehicle is from the battery pack and the actual useful life of these huge lithium based battery packs in this application is still a little iffy... many people believe that you are better off buying a new one, especially since the price of lithium based batteries are expected to go up in the future because of increased demand of a limited resource. (Lithium) This type of vehicle is being mandated all over the world.
We'll see what the costs are years from now. I currently bought 30 kWh storage for my solar for a little over $6K. I couldn't believe how much battery storage price per kWh had gone down. If 5 or so years from now an equivalent EV battery costs $4K I'll consider buying a used EV truck with the knowledge I'd have to soon replace the battery.