There were dozens of stamps issued to celebrate the Bicentennial. You will need to consult the catalogs and do some research. Most libraries will have a copy of Scott's Postage Stamp Catalog of the World. First of all, you have to identify the specific stamp or card. That in itself can be a daunting task, but most of the catalogs are well illustrated with lots of information. Once you know what item you have, the catalog will provide a set of prices that can be used to estimate value.
How much is a bicentennial 1776-1976 quarter dollar worth
What is the value of a boston tea party bicentennial 8 cent stamp worth
Face Value
25 cents.
One dollar.
25 cents.
$100.00
$300..
There were no bicentennial designs for cents, nickels, or dimes. If your coin is from 1976 it's worth exactly 10 cents.
About $15.
It is worth face value unless it has the mintmark "S" on it.
It's worth 25 cents.