Your post has me thinking about how subjective it is to grade what “wear” means in strap goods. When you buy used, you do take on some risk. Sometimes it pays off (I got an amazing $5k-7k saddle for half that and under a dozen rides - not strap goods, but an example of the upside!), but sometimes it’s disastrous.
Both of my currently used bridles are from an excellent maker known for the quality of their French leather and their craftsmanship. Out of the box, their strap goods were lovely and have only gotten better with time and use and care: I look at my tack (which is, if I am rushed, wiped down with a damp cloth, but is most often cleaned daily and conditioned as needed) versus a newer bridle from the same maker that a barnmate who NEVER cleans or maintains tack, and it’s like comparing night and day. My tack shows very little wear, is supple (though not quite as much as I would like, but I take a long game approach), and just feels pleasant. Theirs is dirty, stiff and feels like India Leather. Which is odd, because said tack doesn’t feel like that brand new. Another barnmate has the same exact bridle as the “bad” one, and it is lovely, if over-oiled in my opinion. I think the “care” of the owner for used, it even “lightly used” tack matters, for bridles, I wouldn’t buy one that was soaked in oil. But that’s just me.