Hi there,
I think the best for you to do is edit the listing_price view.
Then just replace this code:
if($this->params->get('price_with_tax')==2){
echo JText::_('PRICE_BEFORE_TAX');
}
if($this->params->get('price_with_tax')==2||!$this->params->get('price_with_tax')){
echo $this->currencyHelper->format($price->price_value_without_discount,$price->price_currency_id);
}
if($this->params->get('price_with_tax')==2){
echo JText::_('PRICE_AFTER_TAX');
}
by this one:
if($this->params->get('price_with_tax')==2){
echo JText::_('PRICE_BEFORE_TAX');
}
if($this->params->get('price_with_tax')==2||!$this->params->get('price_with_tax')){
echo $price->price_value_without_discount;
}
if($this->params->get('price_with_tax')==2){
echo JText::_('PRICE_AFTER_TAX');
}
I think it will do the job (I didn't tested it). I simply replaced the price between parentheses by the price value without any format.
Hope it will help you!