A bit optimistic maybe but IF their description is accurate, not that far off IMHO for an "EXTREMELY solid" 60k mi. #'s matching Stage 1 4-sp. with "amazing interior." $25-30k and again, IF, & someone's got themselves a very decent deal.
Here's the thread from early summer when I posted it. Iirc, the last owner eventually reduced the asking price to 24 or 25k. Cool car but it needs a lot of love. https://www.v8buick.com/index.php?threads/69-gs400-stage-1-4-speed.387077/
I remember it now. Yea, not quite as described. Still a super neat/rare car & ultimate (exc. maybe the color although not bad) stepchild to me wrt options (or lack thereof).