I have a couple blogs, one of them has a very good page rank and Alexa score, right now its on wordpress subdomain will buying a URL affect page rank and alexa score?

I do believe WordPress will automatically do a Redirect for you, in which case the PR and other rankings will transfer over. More information about the redirect can be found at Domain Mapping » Register a New Domain on the WordPress site.

Seeing how both are worthless why does it matter?

Originally Posted by chrishirst

Seeing how both are worthless why does it matter?

I agree.

Originally Posted by chrishirst

Seeing how both are worthless why does it matter?

Considering that there are links pointing to the subdomain, then it does matter. It is not only the PR factor to consider here, but the deep links as well (if he/she has any).

Regardless of PR or Alexa Ranking, if the sub-domain ranked well in SERPs before, you will want it to continue doing so.

The links do certainly, however the question, as usual, was about the worthless and irrelevant SGB and Alexa "values"

I am just softy at heart.