5. Porsche 911 (1965-1998)

The Porsche 911 is a high performance sports car built by Porsche AG since 1963. Ever since their first appearance they have been collectors’ items with the rarest sample being bought at ridiculously high prices. In 2008 Porsche 911 was valued at the price from $8,000 to $13,000. The same retro Porsche 911s are now worth $20,000 to $25,000.

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