My perception is that third gens are a hot commodity right now and everyone is trying to capitalize on it. Just like anything else, trends come and go and this will pass with time.
When I bought my 82 base car in 2009, my circle of friends and family laughed at me and would make fun of the fact that I was stuck in the 80's. The TTA has always held respect with regards to shows, cruise-in, etc, but the other cars were mis understood. I always held my position that "someday" these cars will be sought after. I think that this is now true and reflects with some of the high prices that people seem to think their cars are worth. IMO, the majority of the cars for sale are not "worthy" of the asking prices, but low mileage, unmolested cars are the best prospects.