public function getMaxPayPalDeliveryAmount()
    {
        $maxDeliveryAmount = \OxidEsales\Eshop\Core\Registry::getConfig()->getConfigParam('dMaxPayPalDeliveryAmount');
        if (!$maxDeliveryAmount) {
            $maxDeliveryAmount = $this->maxDeliveryAmount;
        }

        return $maxDeliveryAmount;
    }