Would a 2.4s be a good place to put money?

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I have been thinking about investing in some classic pork, and feel the 2.4s is a good punt? What do you all think?

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http://atspeedmotors.com/1972-porsche-911s-prototy...

About 300k!

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http://www.goodingco.com/vehicle/1973-porsche-911-...

Sold for £200,000!!