No matter what's going on in the market or at a specific company, there are always reasons to consider buying shares in a business. After all, some of the best opportunities in stocks are born from historically bloody times.

Motley Fool CAPS hosts a boatload of opinions from more than 130,000 members on more than 5,300 stocks, giving good reasons to own -- or sell -- a stock.

In the case of thin-film green machine First Solar (NASDAQ:FSLR), a total of 3,538 members have given a bullish or bearish opinion on the company. Scouring the detailed information packed in pitches and other comments on First Solar, here are three of the top reasons to buy First Solar today:

Falling costs per watt: In the fourth quarter, First Solar achieved an industry milestone with per-watt production costs falling below a dollar, down from $1.08 last quarter. The company is looking to reach a range of $0.65 to $0.70 a watt by 2012, helping offset a bleak near-term outlook for the industry. Its scale gives it a nice advantage over smaller solar companies like Evergreen Solar (NASDAQ:ESLR), JA Solar (NASDAQ:JASO), and Yingli Green Energy (NYSE:YGE), which have their own issues with managing costs.

Continued growth: While Trina Solar posted a fourth-quarter loss, other solar players like SunPower (NASDAQ:SPWRA) and First Solar are showing more resilience, with First Solar's revenue and operating income more than doubling from a year ago. With its acquisition of the product pipeline of OptiSolar, it'll add nearly two gigawatts of solar projects to its development pipeline, further building on its organic growth.

Stimulus plan: First Solar credits Germany and government subsidies from other countries in helping it achieve success to date. While huge conglomerates like GE (NYSE:GE) may not see a noticeable boost, many CAPS members feel the U.S. government's plan to boost alternative energy will yield significant benefits to companies like First Solar and Suntech Power (NYSE:STP).

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 very best CAPS members are saying now about First Solar, just click on over to Motley Fool CAPS and have a look -- it's all free, and your opinion's welcome, too.

More Foolishness:

Always looking ahead, the Motley Fool Rule Breakers service recommends companies set to profit from tomorrow's megatrends -- like solar energy. To see what rule-breaking stocks Motley Fool co-founder David Gardner is picking today, take a free 30-day trial.

Fool contributor Dave Mock dreams of his 30 minutes of fame someday on Wheel of Fortune. He owns no shares of companies mentioned here. Suntech Power is a Rule Breakers pick. The Fool's disclosure policy takes ballet lessons and is not afraid to admit it over poker and cigars with the boys.