These have a retail value (like at a coin show) of about $3 to $4.
The stamp-postage value of a stamp is visible on the front of the stamp.
An unused Forever Stamp is worth whatever the current postage rate is. At the moment that's 49 cents.
Is worth anything
The catalog doesn't show an Apollo 15 stamp being issued by the US. There are some generic Apollo stamps that might fit. Most used US postage stamps are worth 15 or 20 cents, the minimum amount required to catalog and stock the stamps. Unused will always be worth at least their face value. Special cancellations and different values are likely to be worth more. Consult a postage stamp catalog, usually available at your local library for exact identification and catalog values.
If it's series 1976 or later, the bill is worth exactly $2.
Two-dollar bills are generally worth two dollars. Adding a postage stamp to it wouldn't affect the value if the bill. The stamp itself, if rare, might be worth more than two dollars.
It is worth the original cost of the stamp.
Its worth about $2.
It is not worth anything
It is worth 15 cents.
The stamp-postage value of a stamp is visible on the front of the stamp.
If it says US Addresses Only it is good for 32 cents worth of postage. The Make Up stamp is worth 3 cents.
value of silver stamp holder
$0.20
.32 Cents
In used condition it is not worth anything. In mint condition it is probably worth 2 times the face value.
The F series stamps were issued in 1991. The postage stamp has a face value of 29 cents.