The phrase "a primary selling point" is correct and usable in written English.
It can be used when discussing the main feature or advantage of a product or service that makes it attractive to potential buyers.
Example: "The eco-friendliness of the product is a primary selling point that appeals to environmentally conscious consumers."
Alternatives: "a key selling feature" or "a main selling advantage".
Security is a primary selling point of the wristband, Nymi.
A primary selling point of munis is that interest on them is exempt from federal income taxes.
WhatsApp has made privacy and security a primary selling point, and has become a go-to communications tool of activists, dissidents and diplomats.
As the company starts a series of 2013-14 upresentationstatinns, in markets like Boston, Chicago, Detroit, Los Angeles and New York, a primary selling point of its executives is to create commercials that are styled like program content — some even featuring the hosts of shows who appear on the channels.
The reliability of Google's uptime seems to be a primary selling point.
It's banking on easy, instant, cable-free Game Of Thrones access as a primary selling point.
But it also ostensibly predates the era when parking became a strip mall's primary selling point.
Bert Straus, an industrial designer with a background in bathroom fixtures, dental-office equipment, and light-rail vehicles, was showing off a prototype of a new helmet called the Gladiator, whose primary selling point is that it has a soft exterior.
He has two studios, one at the family home where he was brought up in the old-money suburb of Houghton, near where Nelson Mandela spent his last years and a neighbourhood in which the primary selling point of property is now the size of its security walls.
In recent years, many manufacturers had stepped stepped away from pushing pixel counts as the primary selling point of a camera, but it's a measure the public seems to respond to.
Microsoft's primary selling point over a narrow specialist like Apple has long been that it offers choice and caters to the masses.
