protected function getOldPriceValueAttribute()
    {
        $obPriceModel = $this->getPriceObject($this->getActivePriceType());
        $this->setActivePriceType(null);

        if (empty($obPriceModel)) {
            return 0;
        }

        $fPrice = $obPriceModel->old_price_value;
        $fPrice = CurrencyHelper::instance()->convert($fPrice, $this->getActiveCurrency());
        $this->setActiveCurrency(null);

        return $fPrice;
    }