Google has got its rules for selling links:
- Buying or selling links to manipulate search engine results and deceive search engines are against Google's policies.
- According to Google, you can sell links for advertising purposes if you add a rel="nofollow" attribute to the href tag or redirect the link to a page which is blocked from searchengines with a robots.txt file.
We depend on search engines and have to obey their rules.
By the way, I've become interested in looking at your website. What's the address?