A link building tactic that I sometimes use is to approach blog owners that have specific pages on their site that have loads of good links pointing to it as well as some good traffic, then ask if they would sell the page to me.

This would then mean that I can either 301 redirect the page to my site or place a link back to my page within it - essentially having complete control over the content of that one webpage.

Advantages: If your webpage has a ton of good quality links pointing to it, you're likely to make a good profit from selling it. If the webpage is a really old post then you might not even miss it from your website.

I've personally paid top dollar for webpages that have a load of high quality relevant links, so I know first-hand how much can be made from doing this.

Disadvantages: Losing control of pages on your website can be a pretty scary concept and there needs to be a lot of trust between both parties. On top of this, Google doesn't exactly like you doing things like this because it's selling links.

Do this at your own risk!