
A stamp dealer is a company or an individual who deals in stamps and philatelic products. It also includes individuals who sell postage stamps for day to day use or revenue stamps for use on court documents. Stamp dealers who sell to stamp collectors and philatelists are of many kinds and their businesses range from small home operations to large international companies.

A philatelic auction, or stamp auction is a sale of stamps, covers and other philatelic material usually run by stamp dealers or specialist collectibles auctioneers, such as, David Feldman, Christie's and Sotheby's, where prospective purchasers place bids in an attempt to obtain the desired items.

A. Alisaffi was a stamp dealer and forger from Istanbul known for his reproductions of the Small and Large Hermes Head stamps of Greece. Material produced by Alisaffi was included on the representative album of forgeries prepared by the Union Philatelique de Genève after François Fournier's death in 1927.

Lloyd Barrington Smith was a Jamaican stamp dealer who is known for his patriotic covers supporting the allies during the Second World War.

Lyman Frank Baum was an American author best known for his children's books, particularly The Wonderful Wizard of Oz and its sequels. He wrote 14 novels in the Oz series, plus 41 other novels, 83 short stories, over 200 poems, and at least 42 scripts. He made numerous attempts to bring his works to the stage and screen; the 1939 adaptation of the first Oz book became a landmark of 20th-century cinema.

Fritz F. Billig (1902–1986) was a Viennese philatelist and stamp dealer who fled to the United States after the Austrian Anschluss in 1938 and continued his career from Jamaica, New York. There he published a successful and long-running series of philatelic handbooks that are still regularly referred to by philatelists today.

Jal Manekji Cooper FRGS in Mumbai was an Indian philatelist, and an expert and authenticator of the postage stamps and postal history of India. Cooper was also a Fellow of the Royal Geographical Society and the author of several philatelic handbooks. He was both a stamp dealer and a collector and was associated with philatelists like C. D. Desai, N. D. Cooper, and Robson Lowe.

Anthony Buck Creeke Jr. was an English solicitor and early philatelist who edited Stamp Collector's Fortnightly and The British Philatelist. In 1903, he was sentenced to six months in jail for trafficking illegally in British official stamps that should not have been available to the public in unused condition. He was removed from the roll of solicitors but reinstated in 1913.

Everard Francis Aguilar was a Jamaican horticulturist, stamp dealer, and philatelist.

David Feldman BA, BBS, RDP(I) is a professional philatelist, auctioneer and author. He held his first stamp auction in 1967. Feldman is Honorary Chairman of David Feldman SA, a Geneva-based auction company, through which he attained record prices for some of the world's most famous postage stamps. In 1993, Feldman auctioned the "Bordeaux Cover", which comprised the 1847 1d Orange-red and the 2d Deep Blue Mauritius "Post Office" stamps, which brought 6,175,000 Swiss francs including all commissions, at that time the highest price ever paid for any philatelic item. He also sold the unique 1855 Sweden Treskilling Yellow stamp at auction in 1996, which at the time was the highest price ever paid for a single stamp, eclipsed in 2014 by the sale of the British Guiana 1c magenta.

François Fournier was a stamp forger who thought of himself as a creator of "art objects" and a friend of the little man.

Jean-Baptiste Philippe Constant Moens was a Belgian philatelist recognized as the first dealer in stamps for collectors. He was one of the original philatelic journalists.

Spink & Son are an auction and collectibles company known principally for their sales of coins, banknotes, stock and bond certificates and medals. They also deal in philatelic items, wine and spirits, and other collectible items.

Béla Székula, also Bela Sekula (1881–1966), was a Hungarian philatelist, stamp dealer and forger who lived in Hungary, Switzerland and the USA.

Emil Carl Christiaan Tamsen was a South African philatelist, who was entered on the Roll of Distinguished Philatelists in 1921. He was also a signatory, in 1932, to the Roll of Distinguished Philatelists of Southern Africa. Tamsen was an expert in the stamps of Transvaal, about which he researched and wrote, and he was one of the founders in 1894 of the Johannesburg Philatelic Society.

Irwin Robert Weinberg was an American philatelist and stamp dealer who formed the syndicate of Pennsylvania businessmen who bought the British Guiana 1c magenta, one of the rarest stamps in the world.