Sales prices are a great incentive for customers to buy from your store instead of the competition. To add sale prices to various products, complete the following steps.
Navigate to CATALOG > MANAGE PRODUCTS.
On the Manage Products page, you will want to use the filters to find the product(s) you'd like to put on sale.
Click to open product page.
Upon page load, select the Price tab in the left-hand column under "Product Information."
The first field labeled, "Price" will be the dollar amount the product is currently listed at.
To add a sale price, enter a lower amount in the Special Price field, as shown above in the image.
You can also add a date if you’d like for the sale to occur for a specific time period.
Click Save in the upper-right hand corner.
All products with a sale price will be featured in special offers sections of your site, www.domain.com//highlight/onsale/
Now you'll want to flush cache and reindex if necessary:
SYSTEM > CACHE MANAGEMENT. Select Flush Cache Storage at the top right of the page.
SYSTEM > INDEX MANAGEMENT. Select All, Submit next to Reindex Data at the top right of the page.