How to know if PR is not redirected for a domain?

Lets say i want to buy some domain, i can see that it has some backlinks, DA, PA, but how can i know that the seller isn't using 301 redirect and all that current PR of that domain i want to buy isn't redirected from another site?

To check redirection use Scrape built in redirection check and ahrefs.com.

You also need a full version of SEOSPYGlass to checkout the quality of links otherwise you might goof.