I understand each page on the internet has its own PR score. But I'm curious to this. Imagine I'm an ebay seller. I'm an ebay seller, and I also have my own online store. My online store rankings are bad, but that's because the keywords I look to rank for a crazy difficult. But the same product I have listed on ebay is loads higher in the SERPS than the same product on my online store. In fact it is on page 2. I want it to get to page 1. Can I set up backlinks for that particular ebay product's URL, or optimize the ebay page so that I can actually affect my PR score for my ebay product, and increase its ranking? Or am I just relying and riding on ebay's high DA and authority? Because if I can do some link building to affect how my ebay product ranks in the SERPS, I'm going to do it. I'm just confused as to whether I can actually influence the ranking of this particular page on ebay... Help appreciated.