"a going rate" is correct and can be used in written English.
It is typically used to refer to the average or prevailing price or cost for something. Example: "The going rate for a one-bedroom apartment in this city is $1,500 per month."
Pancho Villa's dismembered trigger finger has a going rate of $9,500.
At a going rate of about $100 a day, he said, they are already among the highest paid laborers in the industry.
The CMA said it wanted to make sure the cap did not stifle competition by setting a going rate for all lenders.
This week's decision, however seriously it has been approached, has established a going rate for any migration of the BBC into international television.
Top jobs are rarely advertised openly with a going rate for the position – this is negotiated behind closed doors with executives and headhunters, who are recruiting from a limited number of known names.
But Cannon seemed to dismiss derivations of that mode as "cartoon paintings of my people that grace mansions at a going rate of nothing". He developed, instead, his idiosyncratic synthesis of cosmopolitan styles.
"This is pretty much a benchmark going rate to assume this kind of responsibility.
"The problem is that the local authorities are not paying a decent going rate for residential care costs.
A report by market analysts Laing Buission earlier this year that estimated councils were paying £100 less a week than the going rate for a care home place.
Visit auction sites and conduct keyword searches to get a sense of the going rate of a wide assortment of baseball memorabilia.
Tight market conditions have also diminished the impact of an Oscar statuette to an actor's going rate.
