Todays philatelic information from Gustamps

Visitors to Gustamps shop sometimes have some unusual stamp collecting questions. One such question put to Gustamps is "what does obsolete mean as far as stamps are concerned?" Gustamps answer is "obsolete stamps are those which can still be used as postage, but are no longer available from post offices. Once these stamps are demonitised they can no longer be used postally but they still retain their value to philatelists."