That will depend on the specific stamp. Some of the varieties of commemoratives and even definitives with specific markings and perforations can be of moderate value. Consult a postage stamp catalog to find out.
Online sites that have stamp value guides include Stamp Collecting Resources, Stamps Site UK, Hobbizine, Find Your Stamps Value, Stamp Treasures and Mystic Stamp.
Consult a postage stamp catalog to identify the stamp. It will also provide a general value for the item.
If you are certain that it is from 1919, then it must be Scott Catalogue number OX21. The catalogue value is $0.20. That is the minimum value for any stamp listed. Therefore, the true market value for the stamp is very small - maybe around $0.05-0.10.
The tulip stamp was marked as the F Flower stamp. It has a face value of 29 cents.
No they won't get valued
Minimal value means that there is no real value to the stamp. You can purchase a copy for whatever the minimum cost a dealer has set, usually about 15 or 20 cents. That is to cover the cost of handling the stamp rather than the stamp having any real value of its own. Most dealers will not be bothered to buy these unless they are complete sets. Mint sheets are often sold at 80% of the face value.
It is a forever stamp. It is good for the current value of a first class stamp.
This stamps is listed in the Scott Postage Stamp Catalog as number 928. The catalog value is 20c used or unused. This is the minimum value assigned to any stamp. It is not uncommon to to see stamp dealers and stamp collectors use this on their mail. Jim Forte http://wwww.postalhistory.com
The value of a Top Value Stamp, "Toppie," the elephant sign is approximately $42. The better the condition of the stamp, the more money it will be worth.
Face value of the original stamp was $0.20
The value of the 1910 1955 penny stamp value is one pound.