These vary considerably by issue. Unless they have something special about them they are worth face value. It will take some detective work to narrow down the search. Use a catalog online or through your local library to identify the specific item. It will also provide an estimated value.
That would be Scott Number US 1755. A full sheet of these stamps has a catalog value of $40.00.
The Brookman Catalog is the best catalog to get the current value of sheets of stamps.This stamp is Scott Catalog #1382, issued 1969, 138,055,000 were printed.Brookman catalog value for a sheet is: $18.50
This a common US commemorative stamp. Its retail value in good condition - no missing perforations or thin spots and full gum if unused and lightly canceled if used is from 10 to 20 cents retail. Wholesale, the value is 50 cents to 75 cents in lots of 100 for used stamps Unused about 65% of face if you have enough unused stamps to make it worth a dealer's time. Full sheets and plate number blocks can often be sold for full face and maybe 20% more.
This a common US commemorative stamp. Its retail value in good condition - no missing perforations or thin spots and full gum if unused and lightly canceled if used - is from 10 to 20 cents used and around 60 cents mint. Wholesale, the value is 50 cents to 75 cents in lots of 100 for used stamps Unused about 65% of face if you have enough unused stamps to make it worth a dealer's time. Full sheets and plate number blocks can often be sold for full face and maybe 20% more.
There were 3 stamps in that series, so it could be Scott number US 1504-6. A full sheet of these stamps has a catalog value of $15.75 or $22.50 depending on which one it is.
These are still quite common whether you mean the 20 cent regular issue or the commemorative which was issued soon after he dies. Its retail value in good condition - no missing perforations or thin spots and full gum if unused and lightly canceled if used -- is from 10 to 20 cents retail. Dealer would charge up to twice face for the mint stamps. Wholesale, the value is 50 cents to 75 cents in lots of 100 for the used commemorate and 15 cents per hundred for the 20 cent regular issue. Unused about 65% of face if you have enough unused stamps to make it worth a dealer's time. Full sheets and plate number blocks can often be sold for full face and maybe 20% more.
Unless there is a rare plate block number, they are not going to vary in price much. Most modern era stamps, those since about 1940, are going to be worth face value. Dealers sell full sheets of many common stamps at less then face value and certainly don't pay that much for them. Still, consult a catalog and find out their value. You might be surprised!
Scott # 1095 Full sheet with First Day cancellation. Individually, the stamps can be purchased used for .15 each. As a sheet with FDC cancellation, the value would be difficult to determine. It is an unusual item and could get 10 or 20 dollars from a dealer.
{| |- | Stamps are printed in sheets and then perforated and cut. A full sheet, usually 50 or 100 stamps will have perforations on all four sides. When the stamps are cut into long strips to be 'coiled' into rolls, they have straight sides on two opposide sides and perforations on the other two. |}
That would be Scott number US 1745-8. A full sheet of these stamps has a catalog value of $21.00.
Very little £3 or £4, your better of keeping it!
You can get a full page of Boys Town Nebraska stamps on Ebay for 8.00