The Fiat was never sold in the USA. They were sold in many other parts of the world including in Cuba. In Cuba, the car is called the "Polaquito". More on the Fiat 126P.
This example in Largo, Florida has only 37,000 miles and the seller boasts that it's condition is a 9.5 out of 10.
650cc 2-cylinder engine
4-speed manual transmission
Top speed around 70mph
The seller is asking $10,000 and is open to interesting trades. See more on Craigslist.