Tumultuous times offer some of the best opportunities to buy stocks, so the mess the market is in now surely qualifies. And there are many reasons to consider buying shares of global shipping leader UPS (NYSE:UPS).

In our Motley Fool CAPS community, an impressive 1,445 investors (out of more than 130,000 total) have made a bullish or bearish call on UPS. After poring over the information in pitches and other comments, I've dug up three of the top reasons why many members consider UPS a good buy today.

Size and brand: With more than $51 billion in revenue last year, UPS ranks alongside some of the worlds' largest and most recognized companies on the Fortune 500 list, such as Boeing (NYSE:BA), Lockheed Martin (NYSE:LMT), and Caterpillar (NYSE:CAT). The world's largest package-delivery company didn't get there by mere chance, and some CAPS members believe it possesses all the qualities of a solid company built to last well beyond this downturn.

Cheaper today: Some major brands, like UPS competitor FedEx (NYSE:FDX), International Paper (NYSE:IP), and Capital One Financial (NYSE:COF), have been selling at bargain prices lately. Despite a sizeable run in recent weeks, shares of UPS are still hovering near multiyear lows as well, giving us what many investors believe is a great opportunity to nab a quality company at a price that will greatly increase its chances of outperforming the market over the long run.

Strength in diversity: UPS's international package division delivers to more than 200 countries and territories, giving the shipper plenty of regional diversity. Although the company experienced significant weakness domestically, there were much better trends in Europe, China, and Latin America in the fourth quarter. And China's efforts to spend out of the downturn should continue to benefit delivery companies as the country moves toward a more consumer-oriented economy.

Of course, there's a lot more devil in the details of these buy-side opinions, which is why CAPS is such a great resource to check and balance your own analysis. You can read the bullish and bearish sides to every stock. To see what the best CAPS members are saying now about UPS, just click on over to Motley Fool CAPS and have a look -- it's all free, and your opinion's welcome, too.

More Foolishness:

UPS has joined many solid companies that pay great dividends on the recommended list of the Motley Fool Income Investor service. To see all the stocks that have the service beating the market by four points on average, take a free 30-day trial.

Fool contributor Dave Mock often has more fun with the bubble packing that comes in packages than the protected contents. He owns no shares of companies mentioned here. FedEx is a Stock Advisor recommendation. The Fool's disclosure policy delivers on time every time.