public ActionResult Purchase(string id)
        {
            var courier = SalesPostmaster.GetVehicleById(id);

            if (courier.Success)
            {
                SalesPurchaseVM model = new SalesPurchaseVM();

                model.Vehicle = courier.Package;

                return(View(model));
            }
            else
            {
                throw new Exception(courier.Message);
            }
        }
 public static void SetPurchaseFormDropdowns(SalesPurchaseVM model)
 {
 }