My site is at 4th place, 3 places above it is a gumtree (similar to yell, yelp) listing. How can you figure out how difficult it would be outrank those pages? I mean obviously the pages would have low PA and they are top based on the high DA of the site. This also seems to go back to keyword research and difficulty, when I'm doing keyword research and I see a wikipedia site in top 5 rank, or a yell.com or perhaps an article in forbes.com outranks your site. Typically the problem seems to be Google giving a lot of credit to these pages rankings based on the high DA rather than PA of the pages. How would you gauge the difficulty of that keyword then if the competition are pages with very high DA which is impossible to compete with but low PA? Thanks