The above is very powerful.
I used to for example - have a search "-(polar*,"brand new","free shipping",sealed) (repair,faulty,spares,broken,"not working",crack*,dropped,water)" - this worked well to find broken cameras.
Unfortunately, they've improved it, so you don't now get a list of matching auctions, it's aggregated by model.
I do not look forward to ebay 'improvements'.
Making search work well for most is good.
Breaking it utterly for some isn't.
Improvements need to be turn-offable, especially fuzzy matching. If I'm searching for a particular part number, and know the exact model, returning 'close' matches without the ability to turn this off can be completely useless.