I may have a soft spot for testbeds, but development airframes are also something that will interest me.  While driving around Tucson International Airport, we were looking at the various airframes at one of the schools based on the field.  There was a Dash 8 sitting in the yard.  It had Series 200 markings on it and seemed to be a development airframe.  With Mark being a Canadian, he was definitely pleased to catch this but I was too.  It looks in surprisingly good shape.