Here are some links to sites that contain helpful information about the area, and investment properties.
Berks County Montgomery County Chester County Main Page
A general page about the county, and with further links to the various townships, as well as the recorded of deeds, etc.
Sheriff of Berks County Sheriff of Montgomery County Sheriff of Chester County
Straight forward page offering upcoming sales information and a general guide to the purchase of foreclosures in the county.
I don't practice law and am not a lawyer so for those of you looking for legal advice please see the link above, or speak directly with your attorney.