Stamps with letter denomination values:
STAMP VALUE DATE of rate change
==============================
A 15 cents 5/29/78
B 18 cents 3/22/81
C 20 cents 11/1/81 (!)
D 22 cents 2/17/85
E 25 cents 4/3/88
F 29 cents 2/3/91 <<<<<<<<<<<<<<<
G 32 cents 1/1/95
H 33 cents 1/10/99
None of the flower stamps are at all scarce, if that is what you wanted to know.
The tulip stamp was marked as the F Flower stamp. It has a face value of 29 cents.
That is the F stamp and came out in 1991. It has a face value of 29 cents.
The F stamp was a picture of a Flower. They matched the picture to the letter. It has a face value of 29 cents.
The A series stamp pictures an eagle. It has a face value of 15 cents.
According to the website United States Non-denominated Stamp Values, the face value is 37 cents.
The D stamp has a face value of 22 cents and can be used on domestic mail at that value.
Yes
Face value of the original stamp was $0.20
The face value of the D stamp was 22 cents when issued in 1985.
An E stamp is a picture of Earth. It has a face value of 25 cents.
The H stamp was the one with the Hat on it. It has a face value of 33 cents.
Cost of a postage stamp was dependent on the face value of the stamp. The most common rate stamp is for First Class Mail. In the United States 2000 that was 33 cents for the first ounce.