Have you ever experienced sticker shock when looking at a stock? If so, it was probably for something like Berkshire Hathaway (NYSE: BRK.A), with an eye-popping price of $419,020 per share. Thankfully, there are much cheaper companies to buy, and some of them might even grow a bit faster than Warren Buffett's business.

If you're short on ideas for where to find such shares, let's look at a pair of sub-$15 stocks that are obvious buys for investors willing to take on some risk for potential growth. 

With its shares trading for around $13, having gained 139% in the past 12 months, Catalyst Pharmaceuticals (NASDAQ: CPRX) is a little-known biotech stock that's positioned to keep paying off for investors thanks to its progress in treating a rare neuromuscular disease called Lambert-Eaton myasthenic syndrome (LEMS).

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Source Fool.com