Yeah, plus everyone having their own priorities. Some want only BNIB which is its own market. Others are comfortable with Mary Kate-level wear if it means the cheapest possible and again: own market. Then there are further classes dependent on bag, size, color, etc.I’m not sure there’s a separate thread but I would guess people do their own informal investigating and draw conclusions with respect to the items they’re pursuing. I think it’s simply a question of watching the market fairly regularly and consistently. By ‘market’ I mean the usual sites or any specialty sites that carry what you’re looking for.
For my personal filters (B+K, some wear or vintage is good and even preferable for authentication's sake, less than retail, large sizes in neutral colors), the market's definitely softening. Especially from Japan, prob due to the currency softening against the USD. It's a great time to buy resale.