This addon provides a way to check a competitors site, or any number of sites, and show how your prices compare. It displays a message like:

Our Price: $29.99 - Amazons Price: $65.00 - You Save 53.86% !!!

Compatible with all versions of osCommerce.

The support thread is located here:
http://forums.oscommerce.com/topic/3...pare-my-price/

More...