Unicorns: The rarest cars you can buy – but should you?

In the age conformity, everybody wants to be exclusive - maybe one of these can help you achieve just that...

To someone they seemed like such a good idea at the time.Image 1 of 27

These are the halo models that were always doomed to fail – the derivatives that were signed off in a fit of blind optimism, and which would lead to heartbreak in showrooms around the country.

If you’re a second-hand car dealer, you’ll be praying that none of these are offered as a trade-in, because you just know they’ll be a nightmare to shift. But some might make an interesting choice for you…

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