Thank you very much for the answer, I have tried another template and it does not show the prices of related products. This is my related.php file in the two templates, the general one from virtuemart and the one from the site.
<?php defined('_JEXEC') or die('Restricted access');
$related = $viewData['related'];
$customfield = $viewData['customfield'];
$thumb = $viewData['thumb'];
?>
<div class="product-container">
<div class="vm-product-media-container"><?php
echo JHtml::link (JRoute::_ ($related->link), $thumb . $related->product_name, array('title' => $related->product_name,'target'=>'_blank'));
?></div><?php
if($customfield->wPrice){
?> <div class="product-price" id="productPrice<?php echo $related->virtuemart_product_id ?>"> <?php
$currency = calculationHelper::getInstance()->_currencyDisplay;
echo shopFunctionsF::renderVmSubLayout('prices',array('product'=>$related,'currency'=>$currency));
echo $currency->createPriceDiv ('salesPrice', 'COM_VIRTUEMART_PRODUCT_SALESPRICE', $related->prices);
?></div><div class="clear"></div><?php
}
if($customfield->waddtocart){
?><div class="vm3pr-related" ><?php
echo shopFunctionsF::renderVmSubLayout('addtocart',array('product'=>$related, 'position' => array('ontop', 'addtocart')));
?></div><?php
}
if($customfield->wDescr){
echo '<p class="product_s_desc">'.$related->product_s_desc.'</p>';
}
?></div>