You will need to consult the catalogs to identify the specific stamp you are referring to. 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.
Yes- the USPS sells a 5 cent stamp.
3 cent
You are probably looking at the Green 1 cent Scott number 1209 or 1225 which were issued in 1962. They have minimal value and would cost you 15 cents used or mint from a dealer. A dealer probably wouldn't even consider buying one from you, you'd be better off using it for postage.
Well a 42 cent stamp is worth 42 cents. There is no mark up on stamps. They cost face value.
3 cents
20 cents.
Scott #1582 This definitive stamp is worth the minimum 20 cent amount. This price is the cost of cataloging and stocking the stamp. A dealer is not likely to pay for this 2 cent stamp, it would be more work than it is worth.
Yes, the stamp is still valid for postage in the US. Just equal or exceed the cost of mailing the item.
2 u.s stamps 84cents plus a 10-cent stamp to total 98 cents.
2 u.s stamps 84cents plus a 10-cent stamp to total 98 cents.
2 u.s stamps 84cents plus a 10-cent stamp to total 98 cents.
The US has issued a 37 cent stamp honoring John Wayne. Scott Nr. 3876. Scott Nr 2434 is a 25 cent stagecoach stamp. To purchase one will cost about $2. You would be lucky to get face value if you tried to sell it.