A method and system is provided to process sale listings published via a network-based publishing system. The system may include monitoring and ranking components. The monitor component may monitor activity pertaining to at least one of a plurality of sale listings on behalf of a user of the system. The ranking component may determine a number of users monitoring the sale listing and to generate a ranking for the sale listing based on the number of users monitoring the sale listing. The system may be a web-based system including at least one web server that provides the plurality of sale listings via the Internet to the plurality of users. Monitoring criteria may be received relating to an extent to which a plurality of sale listings are monitored by a plurality of users, and the system may conduct a search of the plurality of listings utilizing the monitoring criteria.