Some 6N .com are very valuable, 600086.com for example. Why? Because it is the corporate site as well as stock code of Eastern Gold Jade listed on Shanghai Stock Exchange. Other examples are 601601.com and 300299.com.
Where can you find a list of the stock codes? Wikipedia has one and you can also visit the stock exchange's website at http://english.sse.com.cn/. More than 1,000 companies are listed on the stock exchange so there may be many opportunities to acquire a 6N .com which will be used by one of these companies.