The car is worth whatever someone will pay for it. It seems a little high for the year, but it looks very nice. We have all seen crappy, rusty, non running cars go for that price and more. I bought my 73 that looked the same for close to that. Almost the same color, too. Good luck on the sale. I'm a MN boy as well, and I'll ask around for you and try to help you sell it.
I'm trying to find a color match on mine. Do you have a paint code for that color?