So, you have a few rare stamps. Do not assume rarity automatically equates to the stamps being valuable. This is not necessarily the case.

Let's discuss rarity first. What makes a stamp rare? It could be the stamp was part of a limited run. Perhaps there is something wrong with the actual print job, such as it being off center. It may not be perforated even though it was suppose to be. These “errors” are often considered rare and therefore valuable.

The most important consideration when determining the value of a rare stamp is its condition. Rare stamps in mint condition are worth more to collectors. Stamps that are torn or faded in color may not be worth anything. The closer the stamp is to its original condition, the more valuable.

Keep in mind that the original US postal stamp design did not include perforations. Therefore, an old stamp without perforation may be valuable because of its rarity alone.

Another factor in determining a rare stamp's value is its age. The older the stamp and the better its condition, the higher its potential value. This is particularly true if the stamp is rare in addition to be old.

A final factor to consider when determining a rare stamp's value is whether or not it was used as postage. If the stamp was used for postage, it will have a cancellation mark across its face. These stamps are less valuable than unused stamps. In addition, stamps with light cancellation marks have higher values compared to stamps with darker cancellation marks. In fact, old postage stamps with dark cancellation marks may have no value.

All of these factors must be taken in to consideration as a whole when determining the value of a rare stamp. A stamp from a limited run in 1890 that is in mint condition and never used may have a higher value than an 1870 definitive stamp in good condition with a light cancellation mark.

It is fairly easy to determine a preliminary value of a stamp. You can go to your local library and look at a stamp catalog. You may have to do some research in order to locate the exact stamp you have.

You can also conduct your research online. If you decide to use the internet, make sure the site you are looking it is legitimate. It could be someone who intends to lowball you when giving you an estimate so they can purchase the stamp from you at a rate much lower than its actual value.

The best way to determine the actual value of a stamp is to take it to several experts for opinions. Make sure the experts are credible. You want to visit an actual stamp dealer who makes his living buying and selling stamps. He will have a good sense of the actual value of any stamp you present.