Selling link spots is fine, google doesn’t mind if you sell a text link on your website. That is as long as the links you are selling use the rel=”nofollow” tag. They do this because they don’t want you passing link juice on to other sites that didn’t earn it. So in stupid terms it means, you can open sell link spots as long as you are only providing traffic, if you are providing seo help with that link then you will get your site devalued a lot.

This doesn’t mean don’t sell your hard links, as we all know that is a good way to bring in some nice revenue. Just don’t opely do it. If you have to do it then contact people in person to see if they will sell you one or  vice versa. Don’t openly post on a message board that you are looking to buy or sell hardlinks because then they will start watching what you do to see if things look legit. Think I’m kidding? Try me, google has a team of people that have the sole purpose of making sure the search engines are getting the right sites listed.

So take my advice and follow the above and you should be fine!