Im looking for link building for our site. After few searches and it comes down to below vendors: SEOSHARK: http://www.blackhatworld.com/blackhat-seo/seo-link-building/467238-search-engine-optimization-shark-outrank-your-competitors-100-penguin-panda-safe.html LOGANIX: https://loganix.net/?utm_source=BHW&utm_medium=banner&utm_campaign=bsabhwbanner SDSEOGURU: http://www.blackhatworld.com/blackhat-seo/seo-packages/645701-get-page-1-rankings-today-bhws-1-usa-based-award-winning-search-engine-optimization-agency.html?utm_source=dotcomconsultancy&utm_medium=banner can anyone give me an advise which among all this 3 is worth to spend the money with Good result. Im a bit skeptical with some of them saying guaranteed, as we know there are no guaranteed in RANKING. I need to heard what experiences do you guys have with all this 3 vendors. Thank You in advance.