There's a stock out there that would probably interest Warren Buffett. It touched a 52-week low earlier today, trades just above book value and has a long track record of delivering solid returns.

The company: Berkshire Hathaway.

Berkshire Hathaway hit $109,925 a share earlier today, its lowest level since last June. They have since recovered a bit to trade above $111,000, which is down about 1.5% on the day and down 15% since a Feb. 28 high of $131,300. Berkshire's shares haven't traded below $100,000 since January, 2010.

At the end of the first quarter, Berkshire Hathaway had a book value of $97,081 a share. That means Berkshire is trading about 1.1 times book value. According to Barclays, Berkshire's historical median valuation is about 1.7 times book value, and 1.1 times book value is about as cheap as Berkshire has gotten in the past few years.

Berkshire certainly has issues. Its reinsurance business has taken losses related to natural disaster and its large portfolio of stock holdings is suffering along with the rest of the market, perhaps a bit more.