elgoog wrote:
– be sure all your links use the same structure, so eg. only use http://www.link
and do not use it without www!!!
and do not use it without www!!!
This doesn’t matter if you include a 301 redirect in your htaccess so non-www forwards to www 
Buying links isn’t always a winner as Google has (apparently) gotten quite good at detecting sites that sell links and opinion is they are devalued accordingly.