Postage stamp collecting

Geraedts, Koen - munt & postzegelhandel
Site in Dutch of a Dutch stamp dealer, also sells Dutch India stamps, Suriname stamps, Antilles stamps, and New Guinea stamps

Geraedts, Wouter - Filatelie & Numismatiek
Site in Dutch of a stamp collector and Dutch stamp dealer selling doubles of his collection of Dutch stamps, Dutch colonies stamps, and German stamps. Contact though phone or email to make a stamp exchange and/or buy postage stamps

Hillesum, Renen - Rene Hillesum Filatelie
Site in Dutch of a Scandinavian and Dutch stamp dealer

A.E. Philatelie
Site in Dutch of a Dutch stamp dealer, they also sell stamps from other parts of the world

123Filatelie
Site in Dutch representing a Dutch stamp dealer online.

Netherlands Stamps
A Dutch stamp dealer site where people can purchase Dutch stamps and Former Colonies stamps

NVPH - Netherlands
Dutch stamp dealers association, site has catalogs for The Netherlands, Dutch West Indies, New-Guinea, Curaçao/Nederlandse Antillen/Aruba and Suriname etc...