You'll have to identify the stamp, as the date 1836 must refer to some anniversary. The earliest US stamp is 1847.
Use a catalog online or from your local library to identify the stamp. It will also provide some idea of what the value is.
dated 1992 and were given to us postal workers
A US first class stamp dated 2002 is worth face value only, and it's still valid now.
8 cents.
That depends on how it is dated. If it is part of a stamp design, it might be much newer and celebrated an anniversary. If it is a cancellation, it might have some value. Consult a good stamp catalog to identify the specific variety.
The 1973-74 US stamp is worth .20c for both mint and used (in excellent shape)
The stamp itself is virtually worthless, but the postcard might be worth something. Many people collect postcards.
two dollars smart one
The cost for postage in 2005 was 37 cents.
That will depend a great deal on which 15 cent stamp it is. There have been stamps issued for many decades with that value. Consult a catalog and identify the specific stamp. It will also help you find the value.
There 4 flower stamp is worth 34 cents. They were used to cover increases in postal rates when they weren't sure how much would be authorized. Check the US Postal web site for specific pictures to match up with the one you have.
probobly about $1,000.00 but don't get to excited if u have one because that might not be how much it is worth
The value of a signed letter from Robert A. Heinlein in 1985 can vary depending on factors like condition, content, and provenance. Generally, such items can range from a few hundred to several thousand dollars, with unique or significant pieces potentially fetching higher prices. It's recommended to consult with rare book dealers or auction houses specializing in science fiction memorabilia for a more accurate assessment.