Is it still possible to find expiring domains with valid google pagerank? It seems after 2009, Google is removing any pagerank from expiring domains. Do they get the PR back after re-registration? I also notice that sites like: registercompass.com, no longer show any PR domains at all. Why not?
You can also try out an email alert system like my site's domains dropping soon alerts. This way you can set up personalized criteria to be notified if domains drop (or will drop soon) that meet certain metrics that you specify (traffic, keyword traffic, Alexa rank, etc.).
Email alerts are often times much too slow. By the time you get the alert, someone has already grabbed the great names.