For anyone interested in coming into the series, just a quick trawl reveals quite a few cars available:
http://www.racecarsdirect.com/listing/4 ... 3_2_s.html
http://www.racecarsdirect.com/listing/4 ... brscc.html
http://www.racecarsdirect.com/listing/4 ... s_3_2.html
http://www.porscheracingdrivers.co.uk/f ... .php?id=14
http://www.porscheracingdrivers.co.uk/f ... .php?id=13
At time of writing, there are also at least 4 Boxsters being sold by drivers who have raced in the 2012 season.