Promotions Tab: Special Price
Managed from Catalog > Products > Edit product > Promotions.
In this section You can:
add Special price for this product (click on Add Special button). You can enter a Special Price for this product. In the front-end, this will appear near the original price, which will be crossed out. You can enter a date range within which the Special price will be active. This price will apply automatically when the Date Start arrives and deactivate automatically when the Date End arrives. If you leave this range blank, the Special Price will apply until you remove it.
Discounts/Specials for a customer group will display the special price only if the customer is logged in as that group.
How can I offer bulk or quantity pricing? To set discounts based on the quantity of a product that is being ordered please read Quantity Discounts article