Actually Honda's first car was the S500, then S600, then S800 which was never imported into the US, while the first two models were imported into the US.
Honda S600 - Wikipedia, the free encyclopedia
Since they came to the US before crash and emissions regulations prevented their importation, they would still be available, but good luck finding one at any reasonable price.
I drove an Austin Healey Sprite in my senior year in high school 1967-68 which was comparable to the Honda. The Sprite would be a neat car to upgrade to a modern engine and powertrain combination and it was a very light car. Even as a teenager I managed to get 32 MPG in the Sprite, when gas was 32 cents a gallon.
regards
Mech