In 1867 the US issued its first 15 cent stamp. They have been available ever since then. In May of 1978 the rate for first class postage in the US was raised to 15 cents. It stayed at that rate until March 1981.
How much is 15 cent martin Luther king stamp worth
15 cents
This stamp came out on March 15 (his birthday) in 1967.
1988
"A " stamps are the same as 15-cent stamps.
These are 15-cent stamps -- still good for 15 cents postage.
15 cents.
It will depend on the specific stamp issue. It could be minimal, worth 15 cents postage for each stamp. They may be 50 or 100 stamps to a sheet. There are some very early 15 cent stamps that could be worth many dollars each. Consult a good stamp catalog to identify the stamp and its value.
The value of a 1890 15-cent stamp can vary significantly based on its condition, rarity, and demand among collectors. Generally, these stamps can range from a few dollars to several hundred dollars. To get an accurate valuation, it’s best to consult a stamp catalog or an expert in philately.
That is Scott number US 2418 It has a value of 1.30 mint and minimal 15 cent used.
.50 cents on eBay
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.