If you are going to rank high in Google, you need links, and not any links but high PR link and preferably at least 15 -30 per each URL. Some might even require 200 or more. But here is the list of places where to buy or get your high PR link sources.
First great place that saves you a lot of time is LINKVANA.com. They not only provide you with high PR blogs, but longer you stay the member the higher your PR blog sources are. Their system works the way that you have your own user platform and you can have unlimited projects. The projects are domains with individual urls, for individual pages you are going to link. You can literary do 1000′s of links per month, but their services is monthly cost.
You can try using Angela Links, which is service that gives you sources of 30 backlinks per month. All the work has to be done manually, and out of 30 links, you might be able to use only certain amount of sources. Per one URL it might take us around 6 hours to do, but the links can really help you rank.
There is also another service called pauls backlinks, where he has different packages, of sources of backlinks. It is similar to Angela’s backlinks, but more of these links work, and also all the work is done manually.
Another source is to look at Internet Marketing sites such as warrior forum of digital point. There are people who offer these services. LinkOneWay also offers very low cost packages to get 60 backlinks per each URL at very low price such as 25 dollars per URL and you get 15-20 HIGH pr links with it.