"As of August 2012, sales of Delaware-sourced SRECs tracked on the PJM-EIS Generation Attributes Tracking System (GATS) averaged $189 per MWh, down from $260 MWh average for June 2010-August 2011."
This sounds different from what I heard in our last class, so maybe someone can add some up-to-date details. Thanks to Keith Kiernan for providing the Wall Street Journal article with these links, and to Brandon Case for the photo of his father-in-law's PV system.