



First day cancels on loose sheets or sheets removed from an envelope are not likely to be worth more than $2-4 for the set in my experience.
Postally used individual stamps on cover are highly sought after and I have never seen one myself.
The APS has for sale a publication about these sheets. 
I have a pdf file of the publication if anybody is interested.
Karen, I would think that a first day cancel, while interesting, wouldn't add but maybe .50 per sheet. the 2023 Scott CV for each unused sheet starts at 2.75 for the low denomination and goes to 3.25, 4.25 and 5.25 as the denominations increase. Each stamp used CV starts at .40 each then .50, .65 and .80 each.
It took me a long time to find a complete set unused and I have only found 3 used stamps over the years. Your set would look great in someone's album! Good luck.

I believe that the first day issue of these is May 29, 1976? I can not find the value of a set of these with the cancel dates on the sheets. (Not on envelopes.) Does anyone have any information on this?
Karen

re: 1976 Bicentennial Souvenir Sheets 1686-89
First day cancels on loose sheets or sheets removed from an envelope are not likely to be worth more than $2-4 for the set in my experience.
Postally used individual stamps on cover are highly sought after and I have never seen one myself.

re: 1976 Bicentennial Souvenir Sheets 1686-89
The APS has for sale a publication about these sheets. 

re: 1976 Bicentennial Souvenir Sheets 1686-89
I have a pdf file of the publication if anybody is interested.
re: 1976 Bicentennial Souvenir Sheets 1686-89
Karen, I would think that a first day cancel, while interesting, wouldn't add but maybe .50 per sheet. the 2023 Scott CV for each unused sheet starts at 2.75 for the low denomination and goes to 3.25, 4.25 and 5.25 as the denominations increase. Each stamp used CV starts at .40 each then .50, .65 and .80 each.
It took me a long time to find a complete set unused and I have only found 3 used stamps over the years. Your set would look great in someone's album! Good luck.