The phrase "a single merchant" is correct and usable in written English.
You can use it when referring to one individual or entity engaged in commerce or trade.
Example: "In the bustling market, a single merchant stood out with his unique handmade crafts."
Alternatives: "one merchant" or "a lone merchant."
A single merchant may use several of them.
And a two-page spread of holiday greeting ads in the paper's Nov. 24 issue did not include a single merchant from Port Chester.
The inaugural match, in 1953, involved wines from a single merchant, which published a full list of the bottles it stocked.
705, 3 L.Ed.2d 741, the Court was confronted with the question whether 'a group of powerful businessmen may act in concert to deprive a single merchant, like Klor, of the goods he needs to compete effectively.' 359 U.S., at 210, 79 S.Ct., at 708.
These numbers can either be used for one-time transactions, or as the new, unique card number for a single merchant.
Financial analyst Robert Dodd of Morgan Keegan in Memphis estimates it costs First Data about $1,800 to sign up a single merchant, so it goes primarily for large merchants with high charge volumes.
The Mongols recognized that the caravan trade across Eurasia was extraordinarily expensive for any single merchant.
If a caravan did not make it, no single merchant would be put out of business.
WhitePages says over 50% of the people who've signed up for DealPop to date have already moved to purchase their first deal, and that every single merchant that has offered a deal on DealPop so far has requested a second run.
Indeed, Carp, who has identified a hundred participants, reports that eight of them were employed by a single radical merchant.
Her distress signal had been picked up by only a single Allied merchant ship, which did not report it until she arrived at Fremantle on 17 March.
