Just about what is was worth in 1966, more than likely, without any adjustment for inflation.
Its face value as postage.
can anyone tell me wow much it is worth\ the stamp was circulating in 1957 or 1958
Today (February 4, 2015) it is worth 80 cents US.
The 1966 Kennedy half dollar is 40% silver and worth about $5.00.
20 million
It is worth the cost of the stamp.
2 cents. Unless the stamp is a collector's item (which very few are), an un-circulated U.S. stamp retains the same value as the day it was sold.
1 million dollars
That depends on many factors. A stamp is worth its face value for use as postage. If you have something that is old and is rare, it could be worth some money. Today's First Class postage stamps are 44 cents.
How much is a 1947 Thomas Edison 3 cent stamp worth?
Which one? Without knowing which one and the condition, it really isn't possible to give you a decent answer. Most aren't worth much - about .20
How much is 15 cent martin Luther king stamp worth
Check your stamp at the link below.