Uhhh. yes the key statement is being offered. They aren't selling for those numbers. I can offer my old shoes for 14,000, does not mean anyone will pay me that. The point is the days of reaping premium numbers for the cars is over for the immediate future. If someone really wants or needs to sell their car right now, it is a buyers' market with plenty of supply. And to trump that supply, the price has to be "right". Or wait it out and see if the market comes back around. I chose those examples, because they were all from the first page of results. They also all have a few thousand dollars of mods to them additionally to offset the difference in mileage, or are rarer than the average 87 GN.
Trust me, I know more than a few sellers right now that would be estatic to get a I'll give you 11,000 cash for your car tomorrow phone call.
If you are up to a challenge, find evidence of a car on this board with <30k miles that isn't riding with a Stage II drivetrain or 20,000 in mods that has sold for over 20,000 in the last 6 months and I'll digress to your expertise.