Not sure I investigated it that far but the taxes were listed on the Zillow listing and MLS listing and we confirmed it was not a case of someone not getting a Homestead. My wife viewed the home with a realtor and that was when she was told the taxes were so bad in that district. But imagine that, your mortgage is paid off yet you are still on the hook for $700/MO.
@Mount Joy Snowman, I searched back through some emails and found the millage rate per the realtor: .06850(school and county millage). Of course some of this relies on what they assess it at. She said "Mahanoy Area is one the school districts that never stopped reassessing"