I am interested to host a site like SO and its variants.
Where can I find the pricing?
Meta Stack Exchange is a question and answer site for meta-discussion of the Stack Exchange family of Q&A websites. It only takes a minute to sign up.
Sign up to join this communitySE is not for sale (not any more). They have decided to make it a platform where anyone can suggest a new Stack Exchange site through the specially designed Area51 website.
They have done it this way so that the stackexchange sites can gain the community that is needed for it to be sustainable.