ISNA's report Tuesday doesn't identify the buyer, but quotes the individual's lawyer, Mamoud Isari, as saying the buyer plans to build a museum and exhibit the car.
The 1977 white Peugeot sedan was put up for auction in January in a move by the president to appear to fulfill a campaign promise to put a roof over the head of every Iranian.
Ahmadinejad made a point of being seen in the sedan when he was Tehran mayor. He has rarely used the car since becoming president in 2005.
The car would probably sell for $2,000 on the local market.
