Old Stamps
Private collection of german, european and international and historical stamps
http://www.old-stamps.de/international_stamps.shtml
Worthpoint
A 5 item assortment of princess diana stamps. each comes with a certificate of authenticity from the international collectors society and is in a plastic envelope. the lot consists of: 1981 block of 7...from goantiques
http://www.worthpoint.com/worthopedia/princess-diana-collectors-stamps
Essortment
This article provides the reader with clues as to how to determine the value of a stamp or stamp collection. it advises the reader on points of grading, condition and rarity.
http://www.essortment.com/out-value-stamps-stamp-collection-58607.html
Postzegels
Verzamelaars van overal: kom naar www.delcampe.net en ontdek de eenvoudigste, meest complete en meest efficiënte website bestemd voor veilingen
http://postzegels.delcampe.net/list.php?id_member=00283271&cat=14369&language=D&sessionToken=sslLogin_602557456d0fd3ed1f2b57186d20de78
Delcampe
Delcampe.net is the best auction website dedicated to collectibles: stamps, postcards, coins,...
http://www.delcampe.net
Filatelie
Filatelie
http://filatelie.hids.nl/Postzegel-Handelaren.htm
Collectorsclubchicago
Collectorsclubchicago
http://www.collectorsclubchicago.org/auct06.htm
Danish Collectors
Here you find knowlegdeable danish collectors who might have an answer to your query on danish stamps or postal history
http://www.norbyhus.dk/dklist.html