Apple (AAPL 3.43%), the world's largest company, fell alongside most other stocks during this month's market downturn. It's around 23% off its all-time high, which is likely causing many investors to question whether now is a good time to buy the stock. Although Apple is down significantly, I don't think today's prices are a buying opportunity. Apple is still rather expensive compared to some other big tech stocks, and it would need to tumble further before I'd consider taking a position. Apple's primary re ...