Absolutely. Checked Hagerty. they list a 1970 Buick Riviera GS in #1 Concourse condition at $32,000 and at #2 excellent condition at $21,900. This does not seem to be near a #1 to me.
Like it, but not nearly flawless enough to command that sort of price. Does not even have power seats.
I agree, for the asking price they could fix the A/C & Fuel sender! Yup X-Frames until the 71 model year when they switched to a normal parimeter frame.