That is Scott number US 1716. It has a minimal value and can be purchased for $1.00 in mint condition and 15 cents used.
What is the value of a boston tea party bicentennial 8 cent stamp worth
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.
VALUE
How much is a bicentennial 1776-1976 quarter dollar worth
$6,750.00
There were no bicentennial designs for cents, nickels, or dimes. If your coin is from 1976 it's worth exactly 10 cents.
Face Value
$6,750.00
At least $2.75
25 cents
1000
It is worth the cost of the stamp.