For rare out-of-production cars, prices can be all over the place. Good luck.
About the same as you describe. I have to hit the brakes about 6 or 7 times in a 20-mi commute due to other drivers squeezing into my gap. Which disengages ACC. Resume is around 6mph if it was previously set.I drive in a lot of stop and go and when people would dart in front of me (which is all the time in the city) I would hit the brakes unsure if the car would be able to stop, but I didn't want to risk it. Not sure how well this ACC will perform in that type of situation.