Value of paid for directories
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For a company with a limited budget, is it worth spending money on paid for directories which a high authority to boost your page rank?
Thanks
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It's not worth spending money on anything that'll increase your toolbar PR unless you're planning on selling links, but I'm sure this is just semantics and you're meaning to help you rank

Big 'paid' directories like YDIR, JoeAnt, BOTW can help a new site gain a little authority quickly, however if you're some weird niche and on a page far down them the link juice power of them isn't going to be particularly strong.
Remember you're not actually paying to be in the directory for these sites but for somebody to review the site and see if it's worth including. Don't get links from directories who say they will sell you an entry!
For the price I'd recommend sinking it into some sharable content (good infographics, a few videos to populate a youtube channel etc) and/or invest it in something else that will add value to your brand. The directories aren't bad as such, just maybe not the best way to spend the money.