What's a good indicator on Fiverr?

Hi all,
I run a few niche sites, a dating one and some that target specific keywords in the health and beauty section. I've dropped a lot of links recently and am looking to plant around $50 on fiverr jobs to get some links build back up. Firstly, can anyone recommend a job that does what I want and secondly what is important to look for? If you had $50 to spend, which ones would you pick - social, forums, wikis? Are the pyramid sites better or what. What is my best bang for buck per se?

Thanks,
Amy

look for reputed sellers in fiverr and the services with more reviews..i believe wiki and social are better options

I would say, careful about building links. It might sound awesome to get 10 million backlinks back to your website for $50 but gone are the days when number of backlinks mattered.
Game's changed now. Thinking smarter will have better result than thinking about numbers.

Buy a reputed fiverr deal and customize and drip feed it.might be bit costly but good for you.300+ backlinks a day mixed with tons of social media signals... G +1s,Facebook Likes and Tweets.article syndication is also best to get some authority for your site.

Drip feed is the best.Before buying service contact any previous client of that service to learn about the provider.