Have a look at this car & the price!! Muat be some gold plating somewhere in the car!! https://www.legendarymotorcar.com/inventory/1970-buick-gs-stage-1-2240.aspx
There was/is a thread on it on here - If I can find it later I'll post a link. Interesing back story on the car. Price isn't really out of line based on current market & previous sales. Kinda surprised it hasn't sold.
This could just be my personal bias/opinion, but I don't see whare a bench seat/4-sp. hurts value/desirability.
https://www.v8buick.com/index.php?threads/70-stage-1-4-sp-convertible.362339/ Included there is a link I posted to when another dealer had it several years ago. There's another (slightly contentious) thread somewhere talking about how the orig. #'s matching block was in the trunk and that it is in fact the orig. block. I questioned the 3 digit "date code but not a date code" being out of sync with car's build date but I was assured by the experts that it's the correct/orig. block - Maybe was mis-stamped orig. or maybe Idk what I'm talking about wrt that code.
I know a couple people local to me here in Ottawa, Ontario, who have been to Legendary Motorcar in Halton Hills and they have told me that Peter Klutt has stated that Buicks are a tough sell.