ItemStack item = p.getInventory().getItemInMainHand().clone();

        System.out.println("uncloned air = " + p.getInventory().getItemInMainHand().getType().equals(Material.AIR));
        System.out.println("cloned air = " + p.getInventory().getItemInMainHand().clone().getType().equals(Material
                .AIR));
        System.out.println("item actual name = " + ReflectionUtil.getMinecraftName(p.getInventory().getItemInMainHand
                ()));

        if (item.getType() == Material.AIR) {
            message(p, "command.auction.start.cannot_auction_air");
            return null;
        }