WordNet
n. a dealer in stamps (whose customers are stamp collectors)
Wikipedia
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.
Usage examples of "stamp dealer".
Of course, a single stamp dealer would have a hard time coming up with enough cash to purchase the entire collection, but there were a lot of stamp dealers in any given large city.
I poked through the shabby waiting rooms of three cut-rate dentists and the closet-sized establishment of a rare-coin-and-stamp dealer.
When they let me out of the hospital I went to Silberstein, the greatest stamp dealer in New York.
Hirsh Fedderman, a stamp dealer friend of Meyer's, has a strange problem.