1956 Ford Thunderbird
Porsche 911 Carrera
The Toyota Echo hatchback was sold exclusively in Canada, but I found one in the US with US plates.
Volkswagen Jetta VR6
Mercedes-Benz SL65 AMG
BMW X5 M
Volvo C70 coupe. This was my first time ever seeing one.
Genesis G70. These are selling far slower than they should be.
Mercedes-Benz S63 AMG coupe
2006 Lincoln Zephyr. The Zephyr was new for 2006, but was renamed "MKZ" for 2007. I rarely see Zephyrs.
Hyundai Kona Ironman Edition. Just 223 of these were made.
Aston Martin V8 Vantage
'66 Mustang and '06 Mustang
Pontiac G8 GT. Just 38,433 G8s were sold before GM discontinued the Pontiac brand in 2009.
Mercedes-Benz CL500 AMG
This version of the Chevrolet Nova was a rebadged Toyota Corolla sold from 1985 to 1988 before being replaced by the Geo Prizm. These were generally not preserved and this was my second time ever seeing one. They never sold well, making preserved examples a further rarity. What enthralled me was that it had a Collector Vehicle license plate on the strange-looking back end, which ensures that this one is going to last for a while yet.
Land Rover Series 1
Bentley Continental GTC