Hide Price After Item Is Sold

Is it possible to hide a price after an item is sold? If so, how do I do that please?

Thank you!!

You mean when a product is out of stock ?

If it is, you can edit the view "product / listing_price" and add a check on "$this->row->product_quantity", if it's equal to "0" then display a custom message.

I'm sorry but I don't know how to do that

Can you give me a hand please and thank you!!!

At the beginning of the view "product / listing_price" you can add that line:
<?php if($this->row->product_quantity==0) return; ?>

Thank you very very much. Really appreciate your help guys.