I think trucks are the hot ticket right now. 60's cars seem to have minimal interest, especially in the upper midwest. A bit of interest in 70's cars. Overall, I see a lack of enthusiasm. And prices never recovered from the later 2000's.
Personally I have a lot of other irons in the fire, and would likley liquidate most of my 'birds with the right offer. Unfortunately this takes time and effort, neither of which I have right now. An early onset of winter this year did not help things. 20-30 degrees below normal temps can damper most anything. Was hovering around zero at our cabin this week. Might be different in your neck of the woods. Will be about five months before we start pulling cars out to enjoy them again. Always a sad time of year.