They have a postage value of 37 cents each.
There is an on-line stamp collector that was selling retail at single stamps for one dollar a piece (mint condition), or a sheet of 20 for twenty dollars (also mint condition), of Heroes of 2011 (Semipostal) edition. A collector would probably pay about half of that, which means that they're worth about as much as they cost originally (maybe a little more) 45 cents.
In general, they will have minimal value. You will need to more clearly identify the stamp to determine the value. There are a number of variations. Consult a stamp catalog to identify it.
What was the cost of a postage stamp in 2001
Jason and the Heroes of Mount Olympus - 2001 was released on: USA: 2001
Heroes of Iwo Jima - 2001 TV was released on: USA: 17 June 2001
The tulip stamp was marked as the F Flower stamp. It has a face value of 29 cents.
It is a forever stamp. It is good for the current value of a first class stamp.
The 2002 Christmas stamps were of snowmen. The train stamps of 2001 have a value of 37 cents. Consult a postage stamp catalog, usually available at your local library for exact identification and catalog values.
Heroes for the Planet A Tribute to National Geographic - 2001 TV was released on: USA: 2001
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.
The stamp-postage value of a stamp is visible on the front of the stamp.