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Bill - itsagas posted an update Wednesday, Feb 26, 2014, 1:02pm EST, 11 years, 8 months ago
"Who buys or gives honest values for stamps anymore.. Honest value for almost all mint sheets of US stamps from 1940's to date is probably about 50% of face value. There are some exceptions but not many. (Mostly high or odd face value definitives and some topicals like the first space twins stamps.) Mint US postage is widely available at 20% off face.