What type of domains are the best sellers?

[firealegna]

I'm thinking about buying domains and re-selling them and was wondering if anyone could me on this.
What are best domains to sell? 2 characters? 3? 4? 5?
Which or are gaming domains, internet domains, webmaster domains, or etc. the best sellers?

[proctor]

I can only guess that short single word .com's would be the best investments.

[twisterfries]

One word.This will help people remember the site.Also it must be a popular on the world.And finally very related to the topic of the site.

[rhandy]

nobody beats the one word .com domain.almost all the popular site is using .com.I think this is not a question to be ask!