Stamps (Philately)/stuck mint stamps

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Question
Dear Mark:

I was impressed with your years of experience and good ratings on the experts web page.  I have discovered stamp collecting and am lovingly annotating and compiling my late Grandfather's collection from Chicago.

I have run across some mint stamps that look like they might be valuable but are STUCK together.  Not at all points, but at about 3 key areas that would damage the stamp if forced separation were to occur.  I have had success in a stamp box (some people call it a sweat box) with smaller stamps, but these are plate blocks.  My two questions are:   Could they be valuable?  and How do I separate them and not overly damage the mint gum on the back?
-John Morgan

Answer
John,

Unfortunately there is no solution for unsticking mint stamps that preserves the full value.  For rare plate blocks, a (larger) sweat box is best.  Better to have disturbed gum than a thin.  For common plate blocks, I'd say turn them into postage, because they will be easy to replace.

-Mark Leon

I deal in United States Stamps
http://www.forwardedge.com/usmints.html
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Stamps (Philately)

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Mark Leon

Expertise

I am a collector of United States postage stamps, and also a stamp dealer. I`m a member of the American Philatelic Society (APS). My principle area of interest and expertise is in United States Stamps.

Experience

I've been selling stamps on the internet since early 1996. I maintain a stamp web page that concentrates on mint US stamps issued generally between 1890 and 2009. I'm an active seller on ebay.com since 1996, under the user id "mleon". You can find my web page at http://www.forwardedge.com/usmints.html

Education/Credentials
I have a Bachelor of Science degree in computer science from the University of Nevada at Las Vegas, 1984.

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