http://cmsmart.net/tags/magento-pricing Magento Call for Price Extension simply replaces prices and “Add to Cart” button with the "Call for Price" message to encourage customers to contact with shop owner for more detail price.

1. Magento Call ForPrice Extension
MagentoCall for Price Extensionsimplyreplacespricesand“AddtoCart” buttonwiththe "Call for
Price"message toencourage customerstocontact withshopownerformore detail price.
 There are hundreds of reasons why you may need to remove the prices from your pages:
some products are out of stock at the moment or you don’t want to show prices in some
cases…then our Call for Price extension will help you hide product price. So customers
want to know product price, they should send request to shop owner by message.
Call for Price extension easily replaces “Add to Cart” button by “Call For Price”. It
allows web manager to leave a message to clients and suggest them making a request for
price. When customers want to know price of products and buy them, they will click
“Call for Price” button, the extension will show message in a popup form on website.
Customers fulfill personal information in available form and submit. This extension will
be responsible for sending email directly to website manager and mail feedback to
customer with template that can be created in backend. Especially, you can enable Call
for price for some fields of user and stores are Customer Group, Customer ID & Multi-
store.