Below are the services I personally use to get links to my sites. I've written a quick review of each so you can see their strengths and weaknesses and decide which is right for you.

Textlinks is a relatively new service but it's quickly become my favorite place to buy one way links.

For $99 per month (with a 21-day free trial available) you get 99 credits to buy links from over 10,000 Google-indexed blogs.

You can choose from the following links:

Contextual Links (text links integrated into existing content)

Blog Posts Links (text links integrated into blog posts written by you)

Sidebar Links (text links on the blogroll/sidebar of blogs)

Footer Links (text links on the bottom footer of blogs)

Pricing is $1 (or 1 credit) for all text links except home page links which are $3. And credits never expire, so you can add links at your own pace.

The best part is your links never expire, so you can try out the service and if you decide to cancel you still keep all your links.

Linkvana is well-known as a premium one way link provider, and for good reason.

Their links come from high-PR blogs and just a handful of links from their network can put you on the first page of Google in just a few days for fairly competitive search terms.

For $147 per month (with a 5-day free trial) you can get unlimited links from blogs with domain age and different class C's.

And like Textlinks, your links don't expire even if you cancel your account.