3: Mercedes-Benz 600SL
There was a time when the 600SL was the headliner in the Mercedes-Benz lineup, and with good reason. This car was a performance beast. The build quality of the 600SL was also far ahead of its time as this car has many tech features that you still see today (via Car Gurus).
The 600SL has remained a seemingly affordable option on the used car market but you can bet that the value of these cars is only going to increase. Classic Mercedes-Benz models are becoming harder to come by and this one has a one-of-a-kind look that very few cars have.