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Which of these classic cars would you buy?

Collectible cars are hotter than ever. But if you're looking at future resale, it's important to remember that not all automobiles appreciate at the same rate. So, your favorite car might not also be your best investment.

Take, for example, these three very different classics that were all once popular in California.

The 1932 Ford Roadster was the car everyone wanted to make. It performed. It was pretty. And the attention to detail was the envy of the industry. In 2010, you could've purchased one for about $85,000.

At the same time, for about double the price, you could've bought a 1958 Porsche 356 Speedster. This was the car that took performance to a new level. In a stripped-down, consumer-friendly version of the high-achieving racer, owners could take this beauty to the track, and they could also take it to the supermarket. It picked up where the Ford Roadster left off.

And then there's the toy. For a period of about seven years in the '60s and '70s, people could buy a special kit to make their very own Meyers Manx dune buggy. Five years ago, a 1968 version would sell for about $9,000.

Jay Leno met in his garage with automotive valuation expert Donald Osborne to look at the appreciation of these three very different classic cars. Watch the video to find out which one was the best investment.

Each week, Jay Leno shares his thoughts about hot topics in the auto industry. Tune in to "Jay Leno's Garage" Wednesdays at 10 p.m.ET/PT on CNBC.