Sorry mate, I personally don't recommend fiverr for seo services. I have heard something about their services which are not good.
Even if you use the best rated services on fiverr, you will get moderate quality links at best. These will only help you when the competition is low. At the same time as you will be paying $5 only, there is no harm in trying 1 or 2 services.
I've had some success with some services on fiverr but I would be very careful and not use it as your only source of links
There are definitely great services to be had at Fiverr, you just need to really know what you're doing and spend a lot of time trying out and testing different providers.
not for your websites, i have had great luck getting backlinks to my site's videos to rank page 1 on google though. But i used two fiverr gigs that were "penguin safe" on my main site and i got a google penalty so dont try it. Anything you won't get a penalty for or making stuff for your site you can get some good stuff for 5.
I found some of these fiverr options to get backlinks and became cautious very quickly. If you end up getting loads of 1 type of backlink that are probably spammy auto things (how much work is someone gonna want to do for $4) then with the newest updates, that's probably not a good thing