Maybe the better question is which type of gear would you prefer to buy used.
It’s horrifying enough when new equipment requires servicing and I’ve had some new tube amplifier issues.
Imagine if it was used and not under warranty. I think the importance of what you’re buying justifies a new purchase.
Although, if you’re buying from a dealer that would be better and of all the gear varieties I would prefer to buy speakers used. I think they’re less risky.
Maybe a solid state amplifier but I prefer new stuff although I’ll buy a sendused car if it’s from Germany but would prefer to buy used car from a dealer.
I think you have to equate puppies with audio gear. I think it would be very difficult to buy a used puppy. You simply don’t know it’s history and you kind of would like to be there from the very beginning.

