10. Cadillac CTS-V Wagon
The Cadillac CTS-V is a popular performance sedan and one of the fastest GM models ever. However, the wagon body style was something Cadillac buyers never expected. The second-generation CTS-V model they produced between 2008 and 2014 had a wagon option, which was the rarest of the three body styles Cadillac offered.
Even though the car was a blast to drive and extremely fast, the majority of customers were choosing sedans or coupes. Some buyers weren’t even aware that the wagon option existed. That is why the CTS-V Wagon is a rare but somewhat forgotten model and a future collectible.