This extension will allow you to show a button like "Call for Price" whenever the product's price is zero.
The extension will also hide the "Buy Now" button so it can be used whenever you want to use magent as a product catalogue without the options for adding to cart, checkout, etc
In general it is very usefull if you are looking to find a way to display products without exposing the price of it or when you are setting up a new product and have not decided about the pricing policy yet.
