After sliding 15% from its all-time highs, O'Reilly Automotive might be a classic example of a premium business trading at a fair price. O'Reilly Automotive (ORLY 1.14%) is one of the largest vehicle repair retailers in the United States, selling auto parts, tools, equipment, and accessories. It has grown sales 117-fold since its initial public offering (IPO) in 1993 and would have made a millionaire out of any investor who bought and held $2,500 worth of stock for the next three decades. Investors might be ...