You can set the special rules for each product by adding them to a price book. An example of a price book is a product matrix. It is also possible to set a different price for a specific visitor or user role, for example.
To access the price book page, navigate to Catalog>Manage products. Select the product you want to manage, and click on Pricing>Price book
To create a price book rule, click on ''Add new'' under the heading Price book rules.
Use the ''save'' button to save the price book item.