July 10, 2012 4:20 pm $30 Million Mansion for Sale in Whitemarsh Twp. Here’s a look inside. And the video shows you the outside of this estate in Whitemarsh Twp., Montgomery County, Pa. The price tag is 30-million. It belongs to the founder of Advanta, Dennis Alter. US & World Videos 1:21 SEPTA shares final bus revolution proposal 0:10 Overnight shooting in Delco town 2:02 Suspected gunman surrenders after barricading self in Chester County home 1:25 Residents in Montgomery County warned of possible fraud after mail stolen from collection boxes 2:09 ‘It feels like a slap in the face': Father responds to reinstatement of officer accused of killing son