Wordpress rules does not allow to earn money from the blogs hosted there so I doubt, anyone is willing to pay for it a much.

If my memory serves me, wasn't there like a blogspot blog sold for something like 1.5 million dollars?

Yes if your blog is very popular you can sell if for high price. It is a good way to earn cash.

yes you can sell your blog especially when you have good PR. Lots of buyers out there get a domain for those free blogs they just bought.

To sell blogs could be done, but you should be diligent promotion in many forums. I question why you need to sell your blog, why did not your article?