You can purchase them from a dealer or on eBay for about $2 per cover or even less. They have almost no real gold, such a thin layer that it would take thousands of them to get a measurable amount.
gold
That would be Scott Number US 3774. In mint condition is has a catalog value of $1.50 and the minimal 20 cent used.
If you are lucky you might get a dollar or two. The gold value is almost zero as it is so thin a layer.
No gold US one cent coins were ever made.
Barely, probably the face value of the stamp.
The worth of a 22 cent stamp ranges form 65 cents to 170 dollars.
Very little. The value of the gold is so small as to make it valueless.
New Zealand 20 cent coins have never been minted in gold.
Gold stamps are worth the least amount of money. If you get a green stamp it is worth a couple hundred dollars. The black stamp is priceless.
Their are real 1847 1 cent Hawaiian coins but this is not one of them. No gold 1 cent coins have ever been struck. It's likely a gold plated replica and has no collectible value.
This gold stamp has 1.18 ounces of actual pure 24 carat gold and based on the value of gold on 17th August 2011, the scrap value of the gold is approximately £1275
Almost no gold at all. It is a layer an atom or two thick on aluminum. There is little extra value to these replicas and stamp collectors typically do not want them in their collections.