i think it's happening now. lots of people tell me about how they used to have a datsun 210/ or their friend / parents, etc, and how cool it was back then, then they see a nicely restored one and hey wish they hadn't sold it for $200 when they were 19 and wanted a cooler car.
the old economy cars are getting chewed up at a very fast rate, the datsun 1200/b210/210's are going to be very rare in a few years.