Generally, rarity and demand. It's not enough for a stamp to be just rare, there must also be at least two people who want it. They then compete against each other to buy it, driving the price up. If I have the only copy of stamp, but nobody wants to buy it, it is worthless to me. This is true for any 'collectibles'.
This is a good question. Condition and rarity make a stamp worth money. An old "common" stamp is not worth anything just because it's old. A modern stamp that has a rare feature could make it worth money. For instance, recent coils have rare numbers that make them worth allot to collectors.
Large number of factors are involved. The basic single factor is rarity. There are lots of stamps with single or few known copies. They also need to be desired by collectors. Those that really want the stamps will pay for them. Real collectors avoid 'junk' stamps.
There are many factors to be taken into account:
Rarity is the single most critical factor. That can vary greatly even within the same stamp printing if there are variations in perforations and color.
A few minutes reading the front of a stamp catalog will provide a great deal of insight into valuation of stamps.
older stamps are generally more valuable, but stamps are very slow sellers right now, the market is down, it is not a sellers market at all!
The complete subject in the sentence given is "A valuable stamp collection".
4.60 lol
scientific method become valuable internalized as a process to solve a problem
The most valuable stamp is the inverted Jenny. It was auctioned for over 3 million. There are only about 100 pieces in existence today.
The Queen Victoria, penny-red, plate 77, one penny stamp.
{| |- | When non-collectors ask questions they tend to be the following: How many stamps do you have? What is your most valuable stamp? How long have you been collecting? |}
THE 1993 US Elvis stamp was the best-selling commemorative stamp of all time, with over 517 million sold as singles or in sheets. Many Elvis stamps issued in limited editions are extremely valuable, but not the US stamp.
IN 1903 after the stamp act occured
first become a ninja
One requirement is that you have to be dead. Also consider stamps.com. Anyone can upload their image to a stamp.
It has worked for hundreds of years
They didn't! They are hated in the Carolinas.