Links are sitewide, on same C class IP block (one server). PM me for a list of sites. There are PR4s and some PR5s (second server), and PR0s (very new sites on third server). This network of sites started just few months ago, are on development and improvements (like link exchanges, etc.) stage, it is why prices currently are low. In the future we may be having a lot of sites which 80% of them will be on different C class IP blocks.