This stamp is Scott's number 987, issued in 1950. It catalogs for $0.20 in very fine condiition, mint or used.
See link to - American Stamp Dealers Association
American Stamp Dealers Association
There are numerous organizations for stamp collectors. American Philatelic Society - Considered to be one of the most prestigious organizationsAmerican Topical Association - Many international members Local clubs exist across the World
Your local phone book would be one source. The other key place would be the American Stamp Dealers Association web site has a dealers listing that can help you locate a dealer.
There are a variety of auction houses and stamp dealers. Check your local yellow pages for dealers in your area. I would recommend obtaining a copy of some of the philatelic journals, Stamp Weekly or Lynn's Stamp News. There will be many ads offering to appraise collections. The American Philatelic Association can provide names and addresses of dealers also.
No the stamp act is a.k.a taxes!
yes
The American Revolution.
every stamp is worth it
No of course not! you'd need an airmail stamp.
No, you must buy the stamp in the Country you are sending from.
The American Revolution.