My authentication style is to label a bag as fake if I see characteristics that are obviously fake. My personal comfort level is to not label a bag as 'authentic' because unless I have the bag in my hands, just because I don't see any problems doesn't mean I'm 100% sure it's authentic. I just fail to see any red flags sometimes. So that's how I authenticate and is probably different from the other authenticators.
As for this seller I don't see any red flags. Not a lot of sales, so one neg brings the % down. Sometimes people sell NWOT because the item never had a tag, because it was removed, or because it's not really NWOT, etc. I'm not defending this particular seller.
The bag does look pink but I find the neos in particular hard to photograph.
And I ALWAYS appreciate other opinions!