If it hasn't been cancelled (used), then it's worth a minimum of 6 cents US.
Beyond that it's pointless to speculate, since there have been a huge variety of US 6 cent stamps, and the value depends on which particular one you're talking about, when it was issued, what its condition is, and other factors.
how much is a 1933 3 cent thomas jefferson stamp used is wroth
It's worth $2.01.
1 cent.
The US has issued dozens of Thomas Jefferson stamps, many with a value of 1 cent. You will have to completely identify the stamp to find a value. A catalog, available in most libraries can help you determine the value. Chances are a dealer won't purchase a single stamp unless it is worth more than a dollar or two.
{| |- | Given that description, the stamp could be one about a dozen different Jefferson 1 cent stamps. You will have to provide better identification or a Catalog Number. Check in your local library for catalogs that can help you narrow down the exact stamp. Consult a stamp catalog such as Scott's, for a description on how stamps are rated and graded. |}
This is a very very common US commemorative stamp. Billions were printed. If you want to buy just one it will probably cost you from 10 to 25 cents at a stamp store for a used one. Unused, about twice face. If you want to order it by mail, you would have to pay postage and handling in addition. Dealers get them as part of larger lots for almost nothing per stamp- say 65% face if mint and 1/20 cent if used. It is the kind of stamp I use on letters if unused or give to kids if used.
Scott #1276 A 1 cent Thomas Jefferson stamp is probably not worth the effort to sell. If it hasn't been used it is worth 1 cent of postage. Otherwise you can buy one for 20 cents. Most dealers aren't going to waste their time buying a single low value stamp, too much work involved to have an profit.
In good condition they would have a value of about 15 cents. That means that it is the cost of cataloging and storing the stamp and a dealer would not be interested in buying it. Consult a stamp catalog to more carefully identify and value them.
The value of a Thomas A. Edison 3 cent stamp can vary based on factors such as condition, rarity, and demand. However, in general, a single unused stamp in good condition can be worth around $1-3.
The dates simply indicate the years Jefferson was President of the US. The first US stamp came out in 1840. There have been dozens of stamps issued with Jefferson on them in many denominations. Consult a catalog to determine which it is. My guess would be that you have Scott Nr. 805 which is worth a few cents.
Your question does not make good sense to me-- 600 what ? BTW, this is a very common stamp-- would be hard to sell for more than 1 cent, I would think.
How much is a 1947 Thomas Edison 3 cent stamp worth?