You can create custom price labels for all WooCommerce products with empty prices, using Call for Price for WooCommerce Pro plugin. The setting for adding custom price labels for individual products can be enabled using General Options under General settings.
How this works?
Firstly, go to WooCommerce -> Settings -> Call for Price -> General and enable the Per product setting under General Options section as shown below:
Enabling the setting
This will add a new Call for Price meta box to Edit page of each product on the Admin side.
Meta box on Edit page
Default value is set as No for Enable setting. So you need to first enable it by selecting the Yes option from the dropdown.
Enabling Call for Price option
In the Text (all views) field, you will see Call for Price text by default. You can change this text and customise the label as per the requirements.
Let us understand this setting with examples.
Say you have a product Diamond ring and you would like the customer to call for the price of this product. In this case, on the Edit page of this product enable the Call for Price option. Then enter Call for Price text in the Text (all views) field as shown below:
Add values for displaying the label
The output of this setting will display Call for Price label on the Single Product page on the front end.
Output on Single Product page
Also the Shop page will display the product with Call for Price label as shown below:
Output on the Shop page
You can add any text like Get a Quote instead of Call for Price label in the Text (all views) field.
Adding Get a Quote text
So on the front end, the product page of Diamond Ring will display the label as Get a Quote.
Get a Quote label displayed
In the above example you saw how to add a price label Call for Price to each product from the Edit page. Likewise, you can also add a link instead of a label guiding them to contact you.
Say, we consider the same product Diamond Ring and in the Text (all views) field, add html tag for adding a link of the Contact Us page.
Adding a Contact Us link
This will display a Contact Us link on the Diamond Ring product page instead of Call for Price label.
Contact Us link on product page
So when the customer wants to know the price of the product, he can simply click on the link. This will redirect the customer to the Contact Us page where he can acquire the contact details for calling you to get the price.
Redirecting to Contact Us page
We can do many more things to this Text (all views) field like adding the text, adding the redirecting link to a page, add an email address to that text where customers will directly contact through email, add a link where form will open and many more.