$25,099 seems like a pretty good deal for the buyer - the GS looks very good.
What is strange is that the listing says it has power seats (looks like the driver seat has the manual adjustment arm on it), cruise control (if it has that, it is aftermarket and the picture of the engine bay was so small one couldn't tell if there was an aftermarket setup on it), power locks (weren't they vacuum powered in the day - and I don't see anything like that on this one). Yet the listing also says it is a numbers matching, no modifications, all original. Something just doesn't tie together in this listing.
Still a very nice car for the price the winning bidder got it for.