There are a number of online stamp catalogs available, some do charge a fee. Others have a catalog with prices to purchase stamps from them, but it can give you and idea of value.
Here is a website that shows all the "nondenominational" stamps that have been released. The do have a certain value and this chart is handy to keep around. http://pe.usps.gov/text/qsg300/Q604a.htm
You can find personalized stamps on the following website...www.vistaprint.ca/Rubber-Stamps or at www.examiner.com/article/handmade-custom-stamps I hope this helps.
An easy way to find good value for your stamps is to buy a stamp magazine. Linn's is a good one.
There are many places where one may find DYMO Stamps online. This includes the DYMO Stamps online website, as well as other retailers such as Amazon or even eBay.
Use a catalog to find values. There are several available online, such as Mystic Stamps. You can also find paper versions at most public libraries.
One can find a history of Iraq postage stamps on the website wikipedia. There one will come across a very comprehensible and chronologically sorted history of those postage stamps.
If they are the non-denominated US stamps, there is an identifier on the USPS web site. For collector values, check an online catalog, such as Mystic Stamps.
There are many ways one can learn the value of stamps from Japan. One can learn the value of stamps from Japan at popular on the web sources such as Baxley Stamps and Herrick Stamps.
The could be of value. It would require proper identification to find whether the value is more than just a nominal one. Consult a catalog of postage stamps to identify and determine value.
There is no easy way. You will have to identify the stamps and their condition and then match them against the catalogs to find their retail value. For many collectors this is the fun of collecting, hoping to find that $100 stamp in a collection they paid $5 for.
Try & find them your self but if trouble use another website!
One may find the value of a website by using the services provided by "Worth of Web". The have a website value calculator that will help determine the key factors and average value of a site.