United States postage stamps are used to indicate that the fee for mailing a letter in the U.S. has been paid.

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Alan E. Cohen
Offers mint and used classics and back-of-book material.
C & G Stamps
Specializes in United States stamps from singles to booklets and coils. Offers include graded stamps and stamps with certificates.
Century Stamps
Specializes in mint and used United States stamps from 1847 to the mid-20th century.
Champion Stamp Co.
Offers United States minisheets, sets, and singles, and worldwide bulk lots.
Colorano Silk Cachets
Sells first day covers for United States stamps beginning with the issues of 1995.
DK Enterprise
Sells United States and worldwide stamps, postal history, and collecting supplies, plus coins and banknotes.
Dragon Cards
Offers cards with United States stamps postmarked on the first day of issue beginning in 1983.
Eagle Stamps
Specializes in mint United States stamps with heavy emphasis on post-1930 issues.
First Day Covers Online
Specializes in first day covers produced by Artcraft, Artmaster, Collins, Colorano, Cover Craft, Fleetwood, House of Farnam, Medallion, Mystic, and Reader's Digest.
Frank Bachenheimer
Offers mint and used stamps, including back of the book material.
Gary Posner, Inc.
Specializes in mint and used classics, including airmail stamps and other back of the book issues.
Specializes in graded postage and federal duck stamps.
HB Philatelics
Specializes in regular and back-of-book United States postage stamps and federal hunting permit stamps.
Iowa Stamps & Coins
Specializes in mint and used United States stamps, including revenues and possessions.
Jack Nalbandian, Inc.
Specializes in classics, proofs and essays, and errors.
James E. Lee
Specializes in postal history, essays, and proofs.
Jerry Connolly Stamps
Dealer in California buys and sells graded United States stamps.
Knottywood Treasures
Sells Colorano and Collins first day covers.
Markest Stamp Co.
Buys and sells stamps, with an emphasis on mint United States sheets.
Miller's Stamp Shop
Specializes in United States stamps, including classics and back of book items.
Mystic Stamp Company
Sells United States and worldwide postage stamps and collecting supplies.
The Plate Block Stamp Company
Offers mint plate number blocks, plate number coils, and booklet panes.
Scott A. Shaulis
Sells mint stamps, plus used stamps issued through the 1980s.
Steve Malack Stamps
Sells mint and used issues, plus full sheets, booklets, and freaks.
Steven Ruecker
Specializes in the three cent issue of 1851-57.
Trish Kaufmann
Specializes in the stamps and postal history of the Confederate States of America.
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January 24, 2016 at 4:00:26 UTC
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