Top Level Domains Price Comparsions

I know that .com is probably the most expensive type of domain, since its the most common and scarce it makes sense.

But what comes second? Is it .net, .org, .info(probably not)

Is there a huge price difference people them. Lets say a 4 Character .com vs a 4 character .net or .org.

Any experts on this?

 

http://3character.com/priceguide.html

 

Thanks dude. Interesting stuff