Collector's Stamp Exchange
This is a database web site site, a service offered by NetSer of Castro Valley, California, where individual collectors can list philatelic items they want to buy, sell or trade.

Philatelic Press Club
The international philatelic press club is an association of philatelic journalists, authors, editors, publishers and columnists who aim is to promote stamp collecting.

Philatelic.com
This site specializes in stamps for collectors with an on line Stamp Collecting Mall.Sections in this site includes Country Index, Thematic Index, Dealers, Philatelic Events by Location, Philatelic Organizations, Resources by Theme or Topic, General and Technical Information

StampFinder's Want List Registration Service
You are notified by e-mail when an item you are looking for becomes available.

Stamps.Org
With a list server at Pennsylvania University, this on-line entity has numerous Stamp Trader Lists detailing stamps for sale, exchange, barter or trade.