This car was on Ebay May thru' Sep 2013 by Silverstone Motorcars. Whilst they are in North Andover, MA, the auction stated the car was in Brookfield, IL. Assuming this was correct, how could the car be local to Beaverton, OR, for 12 years?
The car had its "late" nose then and some rust was evident, particularly the passenger fender low down behind the wheel. The paint was ok but may have been an earlier repaint as the "stamped" VIN was painted over and difficult to see then.
The car has now been repainted again; no doubt making the VIN stamp invisible, and, like Mike said, it looks darker than Riviera, assuming computer, camera & lighting are not playing a part.
With the lack of attention to detail on the last refurbishment IMO it is not worth $18,500 and probably why they have had it 4 months and no sale.