public function getPriceObject($iPriceTypeID = null)
    {
        if (empty($iPriceTypeID)) {
            $obPriceModel = $this->main_price;
        } else {
            $obPriceModel = $this->price_link->where('price_type_id', $iPriceTypeID)->first();
        }

        return $obPriceModel;
    }