Thanks for your feedback.
OK I found it! Thanks!! sorry was mu fault I got "Prices" disabled because I want to simplify the seller task.
It is OK. Yes you can modify the theme file to do that.
A new problem I have found is that when products are not yet approved by admin they are listed and even allow customer add them to cart. Probably is a problem with my Prestashop installation...
Make sure the modules is installed correctly
Check module configuration screen to see if there is any error message or warning message.
Also check if the /override/classes/Category.php has been override
A question about the "Expiry date" function: does it only works for virtual products? I was thinking of use it as a system to make sellers do not "forget" their products in my store and automatically clean it.
I do not think we have a Expiry Date? which screen is it appear?
And I noticed the order confirmation mail sent to the customer and the seller are the same. Would be a good idea, in my opinion, be able to send a different information to each one.
That's possible, we can consider this in the future.