Few ways to look at it I guess...
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PageRank is a shaky metrics to use for analysis any way.
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Its an easily achieved, followed link simply by shedding some cash.
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Its $149 or $299 - how does that sit vs, your marketing/link acqusition budget as a total? what is normal cost per acquisition? I don't mean in terms of buying links directly, but producing "stuff" that helps you to acquire them.
In essence, can you acquire as good if not better links for a lot cheaper? If so....save your money, invest it elsewhere.
If budget existed for directory listings I would still pop myself in there personally.