I have read not to buy dropped domains, since google can pinpoint a change of ownership and reset the pr to n/a. But I have bought a couple of high pr packages and looked at the domains and some of them I can see it has been dropped a couple of times but still retain PR. Should I just ignore these dropped sites? I also found that the domains of these high pr sites, don't have any High pr links (actual pr of page linking back) pointing to the domain - yet they are still pr 3 etc... Would the PR drop in the next update? So is this simply a business to them and they would just purchase new domains and just forget about the ones which dropped in PR? Thanks!