anallawalla - 9:16 pm on Feb 3, 2009 (gmt 0)
Work out how much you want to pay by the hour and how much time should they take to research and key in the link information. I have found an average of 10 minutes per link to be fair. Some worthy directories make you fill out longer forms and most need email validation, which adds to the time required. Include a penalty clause for invalid entries such as broken links and off-topic/low-quality links. I'd be more interested in link relevancy than PR of the site's home page.