Zero Day exploit Business - Aptly called “the modern-day merchants of death” selling “the bullets of cyberwar.”

This article is 2 years old so, we can imagine what it would be today

Here is a rough price list

ADOBE READER                                     $5,000-$30,000

MAC OSX                                                $20,000-$50.000

ANDROID                                                $30,000-$60.000

FLASH OR JAVA BROWSER PLUG-INS $40,000-$100,000

MICROSOFT WORD                                 $50,000-$100,000

WINDOWS $60,000-$120,000

FIREFOX OR SAFARI $60,000-$150.000

CHROME OR INTERNET EXPLORER        $80.000-$200,000

iOS         $100,000-$250,000

The links below has more details:

http://www.forbes.com/sites/andygreenberg/2012/03/23/shopping-for-zero-days-an-price-list-for-hackers-secret-software-exploits/