How To Detect Bogus PR Bid Directories

[shuangww]

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I see people soliciting bids to their brand new bidding directories. It is claimed that their brand new directories have solid PR - some as high as 5! I understand that some of these people have bought expired domains / sites and converted them to bid directories and used the existing PR as a selling point. I also understand that it is likely that in a couple of months, the PR is likely to drop as the previous backlinks would not be sustained.

What are your tips on detecting such "bogus" directories? I wouldn't want to make a bid if these directories are likely to fall in importance in a couple of months' time.
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BidRank Directory - Low bids, Good Visibility. $1 per link, $2 per deep link.

Blogsreview.Net - For sale. Interested?

[chazmilles]

You can use tools to detect the real PR of a site based on the PR algorithm . Most of them will drop with the next PageRank update, but worse, some could just be clocking. To detect IP clocking I use www.digpagerank.com

[johnz]

I always use the google toolbar to find the exact pagerank of a particular page or site. After all it is from the google itself and what else and how much credible than you require than the google toolbar itself.

[gingimaster]

i always check th site's cache.
then if it's a directory with a few links and a high PR, you can almost feel the fake ...