There are many ways to find good links that are money site friendly, from my personal experience
Source Market -- Good, you just have to look around for the best reviews and get a service you need.
SEO Clerks -- similar to sourcemarket
Fiverr -- Bad (expect crap most of the time)
There are a bunch of other services to get free/paid links.
I would avoid Posirank and The Hoth for anything really.
Web 2s are your best bet, do some Domain Authority stacking if you are really on the cheap. It works but I wouldnt say its amazing.
If you are looking for better results then you would want to look at creating your own PBN, buying spots on a PBN or get some quality expired web 2 backlinks which I specialise in (see my profile)