This was the era when Chevrolet decided the Nova should go upscale and be luxurious. Dismal failure and the beginning of the end for the Nova. The Concours was gone in '78, as was the entire Nova car line before the end of the 1979 model year. I always thought the Concours hatchback was better looking than the Cabriolet.
This is a fine looking car for the money. Never understand people who go to the trouble and expense of advertising in Hemmings, then don't bother to shake out the floor mats or run a vac over the seats and carpet. He's also got a couple of pics with the passenger door unlatched giving the impression it probably doesn't close well. Attention to details sells cars!