We are in need of social bookmarks, from PR3+ websites only. All most 80% of the links should be DOFOLLOW.
You have to make sure the links are LIVE. If the links are removed you should be able to replace the links.
Please bid with some samples, rate per 100 Social bookmarks each. (Of course, 1 Bookmark per social bookmark site, you cannot have multiple bookmarks from same site, so you should have good resources to begin with)