Legendary investor Warren Buffett doesn't invest on behalf of clients, but his holding company Berkshire Hathaway (NYSE: BRK.A)(NYSE: BRK.B) is the next best thing. After decades of acquiring dozens of privately held businesses and stakes in public corporations, the publicly traded behemoth is one of the world's largest companies.

Buffett has carefully built Berkshire Hathaway to last long after he's gone, always maintaining a long-term vision at the company that's helped the stock outperform the S 500 over the years. But this giant, worth nearly $900 billion, isn't a buy at any price.

Your price will probably have much to do with your investment returns over the coming years. Here is what you need to know.

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Source Fool.com