Full disclosure : I bought a dealer demo Huracan with 1250 miles (it was recently driven down to Monterey from Seattle and back).
What exactly is the concern? So what if someone takes it to 100mph or faster...isn't that what these cars a built for?
How's that different from buying any used sports car? Do you think the owners baby the cars that have 250 miles on them before they get sold?
I have owned a few sports cars/exotics (as many on this forum likely have). All my cars (most bought with low to no miles) hit the track within a week of purchase, several the day after.
They got flogged at the track and some ran as my daily drivers for over 30,000 miles without incident.
I am not the only one that does this, I was just at the track a few weeks ago and a guy comes in with his brand spanking new 991 GT3RS, he had picked it up the afternoon before. He flogged it in the advanced run group.
When I talked to him about it he did this with all his sports cars.
It seems to me the fear of buying a demo car is unfounded and based on bias and emotion and not on any fact.
Can someone provide an example of where the fact it was a demo car ended up being detrimental to ownership?