Margaret said the number of tickets the store sold varied from week to week.
"It depends on how big the draw is. The higher it is the more tickets we sell. On average we do very well from it."
She said she hoped the ticket was sold to a local person, rather than someone just driving through.
"It is not often the locals get a good win."
The Lotto results were posted on the Reporoa Food Market Facebook page yesterday morning.
One woman commented to say she thought it would be "great" if the winner was local.
A spokesman for Reporoa Valley Traders said he knew about the Lotto win, but he had "not heard much chatter" about it from customers since Saturday night.
Lotto NZ confirmed the ticket had not been claimed as of 11.30am Monday.
Six Lotto players around the country won first division in Saturday night's live Lotto draw.
Powerball was not struck and has rolled over to Wednesday night, where the jackpot will be $10 million.
Meanwhile, Strike Four also rolled over and will be $400,000 this Wednesday.
The winning Lotto tickets were sold at the following stores and locations:
MyLotto - Auckland
Reporoa Food Market - Reporoa
Trafalgar Lotto - Whanganui
MyLotto - West Coast
Northlands Pak'nSave - Christchurch
MyLotto - Ashburton