One of my sites lost about 60% of its backlinks at one time. It was using one of those russian networks and the subscription got cancelled. The site has dropped for numerous keywords and have been fighting its way back to the top. The site now has much much better SEO then it did originally but it's nowhere near where it was before. My question is, is this site worth it? I can easily build a new site and have the backlinks directed towards the new site. Should I do that?