Social Bookmarking

I need assistance with social bookmarking -- am looking for quotes for a price per full run of the 79 bookmarking sites listed on www.socialposter.com. Timing is crucial, so URLs need to be bookmarked within 48 hours of receipt of each batch of 5 URLs. Will need to create new accounts for every batch of 5 URLs. This is an on-going need, so I need someone able to bookmark 10 to 20 URLs (or more) per week and provide a spreadsheet with a link to the posted bookmarks. Please do not bid if you are not able to do this on a timely basis. I prefer to pay by paypal, after every 10 URLs are bookmarked. Other arrangements can be made if necessary. Again, please quote your price PER BOOKMARKED URL for full [login to view URL] run (79 sites).