I have dropped a few places back to page 2 and 3 in some cases for my KW. Having checked my domain authority on this site http://moonsy.com/domain_authority/ it suggests my authority is higher than most of my competitors. Domain is 7 years old and has ranked well in the past. It took a bit of a hit with panda in August (dropped down to pages 7 and 8) last year but after I cleaned up a lot of erroneous code it made it back up to some page ones some page two and some page three's. What would be a good strategy to drive my site back up the Serp. I know this is the WH section and I have never considered purchasing links in the past but could it assist here? I should point out that the site has had no links 'built to it' for the last 6 or 7 Months.