[brc]

The only cars which are investment grade cannot be driven, and you've got to be an absolute expert to make money on them - like an art expert, knowing what will be in demand in the future.

No car is an investment, unless you're making money from driving it, ie a limo or rental car.

Porsches have some of the best depreciation resistance in the business, but even they can't resist the pull of gravity that comes with use, and the inevitable production of newer, better models. A pristine, low mileage used Porsche is a good buy, a well-used cheap model is best avoided and admired from a distance.