I've got a collection that's about half and half.
I'm a shooter, not a collector.
I have to agree that staying to quality brands, especially used, is important.
I look at it this way, whenever I buy used, I seem to always find another
reason to buy it new.
And I like all my guns, and have made some fine used purchases.
But the used had no warranty,
came without original boxes and accessories,
2 were very dirty and required extensive cleaning,
and most of the used ones have had dings, scratches, dents or worn off
bluing.
That said, a collector buying used is another story...