<?php
global $woocommerce;
$currency = get_woocommerce_currency_symbol();
$price = get_post_meta( get_the_ID(), '_regular_price', true);
$sale = get_post_meta( get_the_ID(), '_sale_price', true);
?>
<?php if($sale) : ?>
<p class="product-price-tickr"><del><?php echo $currency; echo $price; ?></del> <?php echo $currency; echo $sale; ?></p>
<?php elseif($price) : ?>
<p class="product-price-tickr"><?php echo $currency; echo $price; ?></p>
<?php endif; ?>