Checking for fake PR

[troy]

Hi all,
This week I read a article about fake pr how it works and how to check it.
info:domain.com if the domain comes back its ok if other domain comes up it means its fake because you get redirected.

Is this correct?
I just checked a couple of trade requests with high PR and none of them returned the same URL.
This is one of them.
http://amsterdamshortstay.com/ it goes to www.hotels.nl/amsterdam/

What other things do you look for before you trade with a site?
Thanks in advance.